How to True Carbon Spoke Wheels: Tension & Dish Guide

Bola Carbon Spoke Factory Build & Quality Control (QC) Specifications

Position / Inspection Parameter	Bola Factory Target	Standard Industry Range	Tolerance & QC Limit
Front Disc Side (High Tension)	115 kgf	100–120 kgf (ENVE, NTP)	±5 kgf (≤5% variance)
Rear Drive Side (High Tension)	130 kgf	120–140 kgf (Carbonal, NTP)	±5 kgf (≤5% variance)
Rear Non-Drive Side (Low Tension)	65–80 kgf	Determined by flange offset	Centered dish alignment
Lateral Runout (Side-to-Side)	≤ 0.20 mm	≤ 0.30–0.40 mm	Dial gauge verified
Radial Runout (Roundness/Hop)	≤ 0.30 mm	≤ 0.40–0.50 mm	Dial gauge verified
Spoke Tension Balance (Same Side)	≤ 5% deviation	≤ 10% deviation	Calibrated digital tensiometer

Park Tool TM-1 Conversion Reference (Bola Aero Carbon Spokes)

Target Tension (kgf)	Park Tool TM-1 Meter Reading	Engineering Note
110 kgf	19.5 – 20.0	Front disc side baseline
120 kgf	20.5	Upper front disc boundary
130 kgf	21.5 – 22.0	Rear drive side target

The 7-Step Professional Carbon Spoke Truing Procedure

1. 1. Calibrated Equipment: Use a rigid truing stand, dial indicators, and a spoke tensiometer calibrated with carbon-spoke conversion charts. Never rely on uncalibrated steel spoke tables.
2. 2. Remove Tire & Rim Tape: Always measure tension with tire and rim tape removed to eliminate casing compression effects and access internal nipples properly.
3. 3. Full Wheel Audit: Measure and record every spoke's initial tension around the entire rim before making adjustments. Identify whether wobbles stem from isolated spokes or general dish imbalance.
4. 4. Anti-Rotation Clamp: Clamp the square spoke mandrel with a dedicated spoke holder before turning the nipple. Never allow carbon spokes to twist, and never grip them with pliers.
5. 5. Micro-Adjustments (1/8 Turn): Carbon fiber spokes have significantly higher elastic modulus than steel. Make adjustments in 1/8-turn increments; distribute adjustments across adjacent spokes.
6. 6. Multi-Axis Verification: Verify lateral runout (≤0.2mm), radial runout (≤0.3mm), center dish, and same-side spoke variance (≤5%).
7. 7. Hub-Press Stress Relief: Do not squeeze pairs of carbon spokes together. Apply firm downward body weight onto the hub axle on both sides to settle the nipple seats, then perform a final tension check.

How to True Carbon Wheels: Complete Step-by-Step Guide 2027 (Lateral & Radial)

A properly trued wheel is essential for smooth riding, consistent braking, and long component life. Carbon wheels require special care when truing - the material is strong but can be damaged by excessive spoke tension or improper techniques. This complete guide covers everything: tools needed, understanding wheel truing, step-by-step lateral and radial truing, spoke tension balancing, dishing, common mistakes, troubleshooting, and when to take it to a professional. Works for all Bola carbon wheels (road, gravel, MTB).

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Quick Reference: Tools & Supplies

Tool/Supply	Purpose	Cost	Required?
Truing stand	Hold wheel securely, measure lateral/radial runout	$50-$300	Essential (or use bike frame as makeshift stand)
Spoke wrench (correct size)	Turn spoke nipples to adjust tension	$5-$20	Essential (must match nipple size: 3.2mm/3.5mm)
Dishing gauge	Measure rim centering between hub flanges	$20-$60	Recommended (or use frame/fork as reference)
Spoke tension meter	Measure and balance spoke tension	$30-$150	Recommended (for professional-quality results)
Tension meter conversion chart	Convert tension meter reading to actual tension (kgf)	Free (online)	Needed if using tension meter
Lubricant (light oil or spoke prep)	Lubricate spoke threads and nipple seats	$5-$10	Useful (prevents spoke wind-up)
Marker / tape	Mark high/low spots on rim	$2	Useful
Zip tie (makeshift truing stand)	Attach to frame/fork as a reference pointer	$1	Useful (if no truing stand)
Gloves	Protect hands from sharp spoke ends	$5	Recommended
Digital calipers	Measure rim width, spoke thickness	$15-$30	Optional
Wheel dish reference (frame/fork)	Use bike frame as a dishing reference	Free	Alternative to dishing gauge

Spoke Nipple Sizes (Bola Wheels)

Nipple Size	Common Use	Bola Wheel Series
3.2mm (square)	Most standard spokes (Pillar 1420/1423, Sapim CX-Ray)	CLA, ELT, ULT, SL, ST, EXP, CE
3.5mm (square)	Thicker spokes, some MTB wheels	PRM, PRO, EXT (carbon spoke wheels use special nipples)
Internal nipples (aero rims)	Deep section aero rims (nipples inside rim bed)	Some EXP/CE/EXT deep section models (requires magnetic nipple tool)

Important: Always check your wheel's nipple size before buying a spoke wrench. Using the wrong size wrench can round off the nipple flats, making it impossible to adjust (and requiring nipple replacement). Bola wheels typically use 3.2mm external nipples on most models, and internal nipples on some deep section aero models.

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Understanding Wheel Truing

What is Wheel Truing?

Wheel truing is the process of adjusting spoke tension to make the rim:1. Laterally true (straight side-to-side - no left/right wobble)2. Radially true (round - no up/down hops or flat spots)3. Properly dished (rim centered between the hub flanges)4. Evenly tensioned (all spokes have similar tension, no loose or overly tight spokes)

A properly trued wheel spins smoothly with no wobble or hop, and the brake pads (for rim brakes) or rotors (for disc brakes) don't rub.

When Do You Need to True a Wheel?

Signs your wheel needs truing:- The wheel wobbles side-to-side when you spin it (visible lateral runout)- The wheel has an up-and-down hop when spinning (radial runout)- Brake pads rub on the rim (rim brakes) intermittently- The rotor rubs on the brake pads (disc brakes) intermittently- You hear a "tick" or "ping" sound from the spokes (indicates loose spokes)- The wheel feels "soft" or flexy when riding (loose spokes)- After a crash or hard impact (wheels can go out of true from impacts)- After replacing a spoke (the wheel needs re-truing after spoke replacement)- Every 6-12 months (wheels gradually go out of true from normal riding)

How much runout is acceptable?- High-end road racing wheels: <0.1mm lateral, <0.2mm radial (very tight tolerance)- Standard road/gravel wheels: <0.3mm lateral, <0.5mm radial (good tolerance)- MTB wheels: <0.5mm lateral, <1.0mm radial (MTB wheels have more clearance, so more runout is acceptable)- For disc brake wheels: Lateral runout is less critical (the rotor is separate from the rim), but the rotor itself should be <0.2mm runout. Radial runout still matters (affects ride quality).

Carbon Wheel Truing: Special Considerations

Carbon rims require special care when truing:1. Don't over-tension spokes: Carbon rims are strong but can be damaged by excessive spoke tension. Follow the rim manufacturer's maximum spoke tension recommendation (usually 100-140 kgf for road, 120-160 kgf for MTB).2. Don't use excessive force: When turning spoke nipples, use smooth, controlled movements. Don't jerk or force the nipple (can break the spoke or damage the nipple seat in the carbon rim).3. Check for spoke wind-up: When you turn a nipple, the spoke can twist (wind up) instead of the nipple turning. After each adjustment, release the spoke (let it untwist) by plucking it or squeezing adjacent spokes.4. Don't true a damaged rim: If the carbon rim is cracked, dented, or delaminated, truing won't fix it - the rim needs replacement. Trying to true a damaged rim can make the damage worse (and is unsafe).5. Internal nipples require special tools: Some deep section carbon rims have internal nipples (inside the rim bed). These require a magnetic nipple tool (or a nipple driver through the valve hole) to adjust. If you're not comfortable with internal nipples, take the wheel to a professional.6. Carbon spokes are different: If your wheel has carbon spokes (Bola PRM, PRO, EXT models), they require special care. Carbon spokes don't stretch like steel spokes, and they can be damaged by excessive tension or improper nipple tools. Follow the manufacturer's instructions for carbon spoke wheels.

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Step-by-Step Wheel Truing Procedure

Step 1: Prepare the Wheel and Truing Stand

1. Remove the wheel from the bike (or leave it in the frame if using a makeshift stand).
2. Install the wheel in a truing stand:- If using a dedicated truing stand: Mount the wheel in the stand, ensuring the axle is securely held. Adjust the stand's calipers (pointer arms) so they're close to the rim sidewalls (for lateral truing) and close to the rim bed (for radial truing).- If using the bike frame as a makeshift stand: Leave the wheel in the frame. Attach a zip tie to the seatstay or chainstay (for rear wheel) or fork blade (for front wheel), positioning the zip tie end close to the rim sidewall. This acts as a reference pointer. You can use two zip ties (one on each side) for lateral truing, and one above/below for radial truing.
3. Spin the wheel and observe:- Lateral runout: Watch the rim side-to-side relative to the truing stand calipers or zip ties. Note where the rim moves closest to the pointer (the high spot) and where it's farthest (the low spot).- Radial runout: Watch the rim up-and-down relative to a pointer above or below the rim. Note where the rim is closest to the pointer (high spot / hop) and where it's farthest (low spot / flat spot).
4. Mark the high spots:- Use a marker or small piece of tape to mark the high spots on the rim (both lateral and radial).- For lateral: Mark the spot where the rim is closest to the left pointer (left high spot) and closest to the right pointer (right high spot).- For radial: Mark the spot where the rim is closest to the upper pointer (radial high spot / hop) and closest to the lower pointer (radial low spot / flat spot).
5. Check spoke tension:- Pluck each spoke (like a guitar string) and listen to the tone. Spokes with similar tension should have similar pitch.- Note any spokes that sound significantly lower (loose) or higher (tight) than the others.- If you have a spoke tension meter, measure the tension of each spoke and record it (or at least the loose/tight ones).- Important: The goal is not just to true the wheel, but to do so with even spoke tension. A wheel can be "true" but have uneven tension (which will cause it to go out of true quickly, and can lead to spoke breakage or rim damage).

Step 2: Lateral Truing (Side-to-Side)

Lateral truing adjusts the side-to-side position of the rim. This is the most common type of truing (and the easiest to learn).

How lateral truing works:- If the rim is pulled to the left at a certain spot, you need to tighten the right-side spokes and/or loosen the left-side spokes at that spot. This pulls the rim to the right.- If the rim is pulled to the right at a certain spot, you need to tighten the left-side spokes and/or loosen the right-side spokes at that spot. This pulls the rim to the left.- Think of it like a tug-of-war: the left spokes pull the rim left, the right spokes pull the rim right. To move the rim right, tighten the right spokes (pull harder right) and/or loosen the left spokes (pull less left).

Step-by-step lateral truing:1. Identify the first lateral high spot:- Spin the wheel and find the spot where the rim is closest to the left pointer (left high spot) or right pointer (right high spot).- Start with the largest high spot (the most severe wobble).2. Find the spokes at that spot:- Locate the spoke (or spokes) that attach to the rim at the high spot.- There will be 2-4 spokes near the high spot (1-2 on the left flange, 1-2 on the right flange).- For a wheel with 24 spokes (2X lacing), there will be 2 spokes near any given rim spot (one left, one right).- For a wheel with 28-32 spokes, there may be 3-4 spokes near a given spot.3. Adjust the spokes:- If the rim is pulled left (left high spot):- Tighten the right-side spoke(s) at that spot by 1/4 turn (turn nipple clockwise).- Loosen the left-side spoke(s) at that spot by 1/4 turn (turn nipple counterclockwise).- This pulls the rim to the right.- If the rim is pulled right (right high spot):- Tighten the left-side spoke(s) at that spot by 1/4 turn.- Loosen the right-side spoke(s) at that spot by 1/4 turn.- This pulls the rim to the left.- Important: Make small adjustments (1/4 turn at a time). Large adjustments can over-correct and create a new high spot on the opposite side.- For beginners: Only tighten spokes (don't loosen). Tightening the opposite side's spokes will pull the rim in the desired direction. Loosening spokes can lead to loose spokes (which cause other problems). Once you're more experienced, you can combine tightening and loosening for faster truing.4. Release spoke wind-up:- After turning the nipple, the spoke may have twisted (wind-up). To release the wind-up, pluck the spoke firmly (like a guitar string) or squeeze it with adjacent spokes.- You can also hold the spoke with your fingers (near the nipple) while turning the nipple, to prevent wind-up.- Why this matters: If the spoke is wound up, it will untwist later (while riding), causing the nipple to turn and the wheel to go out of true. Releasing wind-up ensures your adjustments "stick."5. Spin the wheel and check:- After the adjustment, spin the wheel and check if the high spot has improved (or moved).- If the high spot is still there but smaller, repeat the adjustment (another 1/4 turn).- If the high spot has moved to the opposite side (you over-corrected), make a small adjustment in the opposite direction.- If the high spot is gone, move on to the next largest high spot.6. Repeat for all high spots:- Work your way around the wheel, addressing each lateral high spot.- Make small adjustments (1/4 turn) and check after each adjustment.- As the wheel gets truer, the high spots will get smaller and harder to see. You may need to move the truing stand calipers closer to the rim (or tighten the zip tie) to detect smaller high spots.- Continue until the lateral runout is within your desired tolerance (<0.3mm for road, <0.5mm for MTB).

Pro tips for lateral truing:- Work on the largest high spot first: Fixing the biggest wobble first makes the smaller ones easier to see and fix.- Make small adjustments: 1/4 turn at a time. It's better to make 4 small adjustments than 1 large one (large adjustments over-correct).- Check after every adjustment: Spin the wheel after each 1/4 turn to see the effect. This helps you learn how much each adjustment moves the rim.- Don't chase high spots: If you fix a high spot and a new one appears nearby, don't immediately fix the new one - it may be a temporary effect of your adjustment. Spin the wheel a few times and see if the new high spot persists. If it does, fix it. If it goes away, move on.- Keep track of your adjustments: If you're a beginner, it can help to count how many turns you make on each spoke (so you can undo them if you make a mistake).

Step 3: Radial Truing (Up-and-Down / Roundness)

Radial truing adjusts the roundness of the wheel (eliminating hops and flat spots). This is more difficult than lateral truing and requires more practice.

How radial truing works:- If the rim has a high spot (hop - the rim is closer to the upper pointer at that spot), you need to loosen the spokes at that spot (both left and right). This allows the rim to move outward (away from the hub), reducing the high spot.- If the rim has a low spot (flat spot - the rim is farther from the upper pointer at that spot), you need to tighten the spokes at that spot (both left and right). This pulls the rim inward (toward the hub), reducing the flat spot.- Think of it like a drum: tightening spokes pulls the rim inward (smaller diameter), loosening spokes allows the rim to move outward (larger diameter).

Step-by-step radial truing:1. Identify the first radial high spot (hop):- Spin the wheel and find the spot where the rim is closest to the upper pointer (or farthest from the lower pointer). This is a high spot (hop).- Start with the largest high spot.2. Find the spokes at that spot:- Locate the 2-4 spokes that attach to the rim at the high spot (1-2 left, 1-2 right).- For radial truing, you adjust BOTH left and right spokes equally (because you're changing the diameter, not the side-to-side position).3. Adjust the spokes:- For a high spot (hop):- Loosen both left and right spokes at that spot by 1/4 turn each.- This allows the rim to move outward (larger diameter), reducing the high spot.- For a low spot (flat spot):- Tighten both left and right spokes at that spot by 1/4 turn each.- This pulls the rim inward (smaller diameter), reducing the flat spot.- Important: Make small adjustments (1/4 turn at a time). Radial adjustments have a bigger effect than lateral adjustments (because you're adjusting both sides simultaneously).- Always adjust both sides equally: If you loosen the left spoke but not the right, you'll introduce lateral runout (the rim will pull to one side). Always adjust left and right spokes by the same amount for radial truing.4. Release spoke wind-up (same as lateral truing - pluck the spokes to release twist).5. Spin the wheel and check:- After the adjustment, spin the wheel and check if the high spot has improved.- If the high spot is still there, repeat (another 1/4 turn).- If you over-corrected (created a low spot), make a small adjustment in the opposite direction.- If the high spot is gone, move on to the next largest high spot.6. Repeat for all high/low spots:- Work your way around the wheel, addressing each radial high spot and low spot.- Make small adjustments and check after each.- Continue until the radial runout is within your desired tolerance (<0.5mm for road, <1.0mm for MTB).

Pro tips for radial truing:- Radial truing affects lateral truing: When you adjust both left and right spokes equally (for radial), you may introduce a small amount of lateral runout (if the left and right spokes don't have exactly the same tension). After radial truing, re-check lateral truing and fix any new high spots.- Radial truing is harder to see: Radial runout is often less visible than lateral runout. You may need to spin the wheel slowly and watch carefully (or use a dial indicator for precision).- Don't try to fix a flat spot from a crash: If the rim has a flat spot from an impact (crash, pothole), radial truing may not fully fix it (the rim may be permanently dented). If the flat spot is severe (>1mm), the rim may need replacement.- For beginners: Focus on lateral truing first (it's easier and more noticeable). Once you're comfortable with lateral truing, try radial truing. If radial truing seems too difficult, take the wheel to a professional (it's worth the cost for a round wheel).

Step 4: Dishing (Centering the Rim Between Hub Flanges)

Dishing ensures the rim is centered between the left and right hub flanges. This is important for proper wheel alignment in the frame/fork.

How to check dish:1. Using a dishing gauge:- Remove the wheel from the truing stand.- Place the dishing gauge on the rim (the gauge has two feet that rest on the rim sidewalls, and a center pointer that touches the hub locknut/end cap).- Flip the wheel over and measure the other side.- The measurements should be equal (the rim is centered). If one side is larger than the other, the rim is off-center (needs dishing adjustment).2. Using the bike frame/fork (alternative):- Install the wheel in the frame/fork.- Measure the distance from the rim sidewall to the seatstay/chainstay (rear wheel) or fork blade (front wheel) on both sides.- The distances should be equal. If one side is closer to the frame than the other, the rim is off-center.- Note: This method assumes the frame/fork is straight (not bent). If the frame is bent, the measurements won't be accurate.

How to adjust dish:- If the rim is off-center to the left (closer to the left hub flange), you need to tighten all right-side spokes by 1/8-1/4 turn (this pulls the rim to the right) and/or loosen all left-side spokes by 1/8-1/4 turn.- If the rim is off-center to the right, you need to tighten all left-side spokes by 1/8-1/4 turn and/or loosen all right-side spokes by 1/8-1/4 turn.- Important: Dishing adjustments affect the entire wheel (all spokes on one side). Make very small adjustments (1/8 turn at a time) and check after each. Dishing is a coarse adjustment - once you're close, fine-tune with lateral truing.- For beginners: If you're not sure about dishing, take the wheel to a professional. Improper dishing can cause the wheel to rub on the frame/fork, or cause uneven spoke tension (leading to spoke breakage).

Step 5: Spoke Tension Balancing

Once the wheel is laterally true, radially true, and properly dished, the final step is to ensure all spokes have even tension.

How to check spoke tension:1. By ear (plucking):- Pluck each spoke (like a guitar string) and listen to the pitch.- Spokes on the same side (left or right) should have similar pitch.- Left-side and right-side spokes may have different tension (especially on rear wheels, where the drive side spokes are tighter than the non-drive side). This is normal.- Note any spokes that sound significantly different (much lower or higher pitch) from the others on the same side.2. With a tension meter (more accurate):- Clamp the tension meter onto each spoke (in the middle of the spoke, away from the nipples and hub).- Read the meter value and convert to kgf using the manufacturer's conversion chart (the conversion depends on spoke thickness and material).- Record the tension for each spoke.- The tension should be within the rim manufacturer's recommended range (usually 100-140 kgf for road, 120-160 kgf for MTB).- The variation between spokes on the same side should be <10% (e.g., if most spokes are 120 kgf, none should be below 108 or above 132 kgf).

How to balance tension:- If a spoke is too loose (lower tension than the others on the same side), tighten it by 1/8-1/4 turn.- If a spoke is too tight (higher tension than the others), loosen it by 1/8-1/4 turn.- Important: When you adjust a spoke's tension, you may affect the lateral/radial truing. After each tension adjustment, re-check the truing and fix any new high spots.- Work in small increments: 1/8 turn at a time. Tension balancing is a fine adjustment - you don't want to undo your truing work.- Stress relieve the spokes: After tension balancing, stress relieve the spokes by squeezing pairs of parallel spokes together firmly (like squeezing a handlebar). This helps seat the spokes and nipples, and releases any remaining wind-up. After stress relieving, re-check the truing (it may have shifted slightly) and make final adjustments.

Why tension balancing matters:- A wheel with even tension is more durable (spokes are less likely to break from fatigue).- A wheel with even tension stays true longer (no single spoke is overloaded).- A wheel with even tension has better ride quality (stiffer, more responsive).- A wheel with uneven tension can have spokes that break (the loose spokes flex more, causing fatigue failure) or a rim that cracks (the tight spokes put too much stress on the nipple seat in the rim).

Step 6: Final Check and Test Ride

1. Final truing check:- Spin the wheel in the truing stand (or frame) and verify:- Lateral runout <0.3mm (road) or <0.5mm (MTB)- Radial runout <0.5mm (road) or <1.0mm (MTB)- No brake pad/rotor rub- If any high spots remain, make final small adjustments.
2. Tension check:- Pluck all spokes and verify even tension (similar pitch on each side).- If you have a tension meter, verify all spokes are within the recommended range and <10% variation.
3. Stress relieve:- Squeeze pairs of parallel spokes firmly (3-4 times per pair) to stress relieve.- Re-check truing (may have shifted slightly) and make final adjustments.
4. Install the wheel on the bike:- Install the wheel in the frame/fork.- For rim brakes: Check that the brake pads don't rub on the rim (spin the wheel and listen/feel for rub). Adjust brake caliper position if needed.- For disc brakes: Check that the rotor doesn't rub on the pads. Adjust caliper position if needed.
5. Test ride:- Take the bike for a short ride (5-10 minutes).- Ride over some bumps (to stress the wheel) and check for any unusual sounds (tick, ping, creak).- Test the brakes (ensure no pad/rotor rub).- After the ride, re-check the truing (the wheel may settle slightly after riding). If it's still true, you're done!- If it went out of true after the ride, you may have loose spokes (re-tension and stress relieve) or a damaged rim (inspect carefully).

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Common Mistakes to Avoid

Mistake 1: Making Large Adjustments (1+ Turn at a Time)

The mistake: Turning a spoke nipple a full turn (or more) at once, thinking "more = faster."

Why it's wrong:- A full turn of a spoke nipple can move the rim by 1-2mm (which is a lot for truing - typical tolerance is <0.5mm).- Large adjustments over-correct, creating a new high spot on the opposite side.- You end up chasing high spots back and forth, making the wheel worse instead of better.- Large adjustments can also cause spoke wind-up (the spoke twists instead of the nipple turning), which leads to the adjustment "un-doing" itself later.

The fix: Make small adjustments (1/4 turn at a time, or even 1/8 turn for fine-tuning). Check the effect after each adjustment. It's better to make 4 small adjustments than 1 large one. Patience is key - a proper truing job takes 15-30 minutes per wheel (for a beginner).

Mistake 2: Not Releasing Spoke Wind-Up

The mistake: Turning the nipple without holding the spoke, causing the spoke to twist (wind up).

Why it's wrong:- When you turn the nipple, the spoke can twist along its length (like a torsion spring) instead of the nipple rotating on the threads.- The twisted spoke stores energy. Later (while riding, or when you pluck the spoke), the spoke untwists, which turns the nipple and changes the spoke tension.- This means your truing adjustments "un-do" themselves - the wheel goes out of true shortly after you finish.- Spoke wind-up is especially common with bladed spokes (Sapim CX-Ray, Pillar 1420) and thin spokes (they twist more easily).

The fix:- Hold the spoke near the nipple with your fingers (or a spoke holder tool) while turning the nipple. This prevents the spoke from twisting.- After each adjustment, pluck the spoke firmly (like a guitar string) or squeeze it with adjacent spokes. This releases the wind-up (you'll feel/hear the spoke "ping" as it untwists).- For bladed spokes: Use a spoke holder (a small tool that clamps onto the flat part of the blade) to prevent twisting. You can also hold the blade with your fingers (but it's harder to get a good grip).- After you finish truing, stress relieve all spokes (squeeze pairs of parallel spokes firmly) to release any remaining wind-up. Then re-check the truing (it may have shifted) and make final adjustments.

Mistake 3: Only Tightening Spokes (Never Loosening)

The mistake: Only tightening spokes (to pull the rim) and never loosening any, leading to excessive overall tension.

Why it's wrong:- If you only tighten spokes (never loosen), the overall tension of the wheel increases over time.- Excessive spoke tension can:- Crack the carbon rim (especially at the nipple seats)- Pull the nipple through the rim (especially on lightweight rims)- Cause spokes to break (from over-tensioning)- Make the ride harsh (over-tensioned wheels are stiff and uncomfortable)- For lateral truing, it's more effective to combine tightening one side and loosening the other (this moves the rim without changing the overall tension).

The fix:- For lateral truing: When the rim is pulled left, tighten the right spokes AND loosen the left spokes (by the same amount). This moves the rim right without changing overall tension.- For radial truing: For a high spot, loosen both sides; for a low spot, tighten both sides. This changes the diameter without affecting lateral position.- Check overall tension periodically (by plucking or with a tension meter). If all spokes are getting tighter than the manufacturer's recommendation, loosen all spokes slightly (1/8 turn each) to bring the overall tension back into range.- For beginners: It's OK to only tighten at first (it's simpler). But as you get more experienced, learn to combine tightening and loosening for better results.

Mistake 4: Truing a Damaged Rim

The mistake: Trying to true a rim that's cracked, dented, or delaminated (from a crash or impact).

Why it's wrong:- A damaged carbon rim can't be properly trued - the damage (crack, dent, delamination) creates a permanent high or low spot that spoke adjustment can't fix.- Trying to true a damaged rim can make the damage worse (excessive spoke tension can propagate a crack or worsen a delamination).- A damaged rim is unsafe to ride - it can fail catastrophically (especially under load or during hard braking).

The fix:- Before truing, inspect the rim carefully for damage:- Cracks: Look for cracks on the rim sidewalls, rim bed, or spoke holes. Cracks may be visible as fine lines, or you may see white/gray residue (carbon dust) around the crack.- Dents: Look for dents or flat spots on the rim sidewalls or rim bed (from impacts).- Delamination: Look for bubbling, peeling, or soft spots on the rim (indicates the carbon layers are separating).- Brake surface damage (rim brakes): Look for excessive wear, grooves, or cracking on the brake surface.- If you find any damage, do not ride the wheel - it's unsafe. Take it to a professional for evaluation. If the damage is severe (crack, delamination), the rim needs replacement. If it's a minor dent (and the rim is otherwise intact), a professional may be able to repair it (but carbon rim repair is expensive and not always possible).- Bola carbon wheels come with a 2-year warranty and 50% crash replacement. If you damage a Bola rim, contact info@bolacarbon.com for a warranty evaluation or crash replacement quote.

Mistake 5: Ignoring Spoke Tension (Only Focusing on Truing)

The mistake: Focusing only on making the wheel "look true" (no wobble/hop) and ignoring spoke tension balance.

Why it's wrong:- A wheel can be "true" (no wobble) but have very uneven spoke tension (some spokes very tight, some very loose).- Uneven tension causes:- Spoke breakage: Loose spokes flex more (fatigue failure), and tight spokes can break from over-tension.- Premature wear: The wheel goes out of true quickly (loose spokes allow the rim to move).- Rim damage: Tight spokes put excessive stress on the nipple seats (can crack the carbon rim).- Poor ride quality: The wheel feels "soft" or "dead" (uneven tension affects the wheel's stiffness and responsiveness).- A wheel with even tension but slight runout is better than a wheel that's "perfectly true" but has wildly uneven tension.

The fix:- After truing (lateral and radial), check spoke tension (by plucking or with a tension meter).- Balance the tension: tighten loose spokes, loosen tight spokes (small adjustments, 1/8 turn at a time).- After tension balancing, re-check the truing (it may have shifted slightly) and make final adjustments.- Stress relieve the spokes (squeeze pairs of parallel spokes) to ensure the tension is "set."- For a durable, long-lasting wheel, aim for:- Lateral runout <0.3mm (road) / <0.5mm (MTB)- Radial runout <0.5mm (road) / <1.0mm (MTB)- Spoke tension within manufacturer's range (100-140 kgf road, 120-160 kgf MTB)- Tension variation <10% between spokes on the same side- Proper dish (rim centered between hub flanges)

Mistake 6: Using the Wrong Size Spoke Wrench

The mistake: Using a spoke wrench that doesn't fit the nipple properly (too big or too small).

Why it's wrong:- A wrench that's too big will slip on the nipple flats, rounding them off. Once the flats are rounded, you can't turn the nipple with a standard wrench (you'll need to replace the nipple - which requires removing the tire and tape, and possibly the spoke).- A wrench that's too small won't fit on the nipple (can't turn it).- Using the wrong wrench can also damage the nipple (cracking it or stripping the threads).

The fix:- Check your nipple size before buying a wrench. Common sizes:- 3.2mm (most common - used on Pillar 1420/1423, Sapim CX-Ray, and most standard spokes)- 3.5mm (used on some thicker spokes and MTB wheels)- Internal nipples (used on some deep section aero rims - require a magnetic nipple tool)- If you're unsure, measure the nipple with calipers (across the flats).- Buy a good quality spoke wrench (e.g., Park Tool SW-0, SW-1, SW-2, or the DT Swiss Pro Line spoke wrench). Cheap wrenches have loose tolerances and are more likely to slip.- For internal nipples: Use a magnetic nipple tool (e.g., DT Swiss Nipple Driver) that inserts through the valve hole. If you're not comfortable with internal nipples, take the wheel to a professional.

Mistake 7: Truing Without a Truing Stand (Poor Reference)

The mistake: Trying to true a wheel by eye (without a truing stand or a good reference pointer), making it hard to see small high spots.

Why it's wrong:- Without a good reference (a pointer close to the rim), you can't see small high spots (<0.5mm). You'll only see large wobbles, and you'll miss the small ones that affect brake rub and ride quality.- Truing by eye (holding the wheel up and looking at it) is very imprecise - you can't tell if the runout is 0.5mm or 2mm.- A poor reference leads to a poorly trued wheel (you think it's true, but it's not).

The fix:- Best option: Use a dedicated truing stand (e.g., Park Tool TS-2.2, TS-4, or the professional PCS-1). A good truing stand has adjustable calipers that you can position very close to the rim, allowing you to see high spots as small as 0.1mm.- Budget option: Use the bike frame as a truing stand. Leave the wheel in the frame and attach a zip tie to the seatstay/chainstay (rear) or fork blade (front), positioning the zip tie end very close to the rim sidewall. Use two zip ties (one on each side) for lateral truing, and one above/below for radial truing. This works surprisingly well (almost as good as a dedicated stand) if you position the zip ties carefully.- Another option: Use a dial indicator (mounted on a stand or the frame) for precision truing. A dial indicator can measure runout to 0.01mm (very precise). This is overkill for most home mechanics but is used by professional wheel builders.- Key point: Whatever reference you use, position it very close to the rim (0.1-0.5mm gap) so you can see small high spots. The closer the reference, the more precise your truing.

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Troubleshooting Common Truing Problems

Problem 1: Wheel Won't Stay True (Goes Out of True After Riding)

Symptoms: You true the wheel, it looks perfect, but after one ride (or a few days), it's out of true again.

Possible causes:1. Spoke wind-up not released: The spokes were twisted during truing, and they untwist while riding, changing the tension.2. Spokes not stress relieved: The spokes and nipples haven't settled into their final positions. After riding (which stresses the wheel), they settle, causing the wheel to go out of true.3. Uneven spoke tension: Some spokes are much tighter/looser than others. The loose spokes allow the rim to move, and the tight spokes pull it out of true.4. Damaged rim: The rim has a crack, dent, or delamination that prevents it from holding true.5. Loose spokes: Some spokes are very loose (below the recommended tension). They flex and allow the rim to move.6. Damaged/spoke about to break: A spoke is fatigued (cracked) and about to break. It flexes more than normal, causing the wheel to go out of true.

How to fix:1. Release all spoke wind-up: Pluck each spoke firmly (or squeeze pairs of parallel spokes) to release any twist. Then re-check the truing and make adjustments.2. Stress relieve all spokes: Squeeze pairs of parallel spokes firmly (3-4 times per pair, all the way around the wheel). This seats the spokes and nipples. Then re-check truing and adjust.3. Balance spoke tension: Check all spokes (by plucking or with a tension meter). Tighten loose spokes, loosen tight spokes (small adjustments). Re-check truing after each adjustment.4. Inspect the rim for damage: Look carefully for cracks, dents, or delamination. If you find damage, the rim needs replacement (don't try to true a damaged rim).5. Check for broken/cracked spokes: Inspect each spoke carefully (especially near the hub and nipple). Look for cracks, bends, or discoloration (indicates fatigue). If a spoke is cracked, replace it immediately (it will break soon).6. Re-true and test ride: After addressing the above, re-true the wheel, stress relieve, and take it for a test ride. If it stays true after the ride, you're done. If it goes out of true again, there may be a more serious problem (damaged rim or hub) - take it to a professional.

Problem 2: Spoke Nipple Won't Turn (Stuck or Seized)

Symptoms: You try to turn a spoke nipple, but it won't move (even with force).

Possible causes:1. Corrosion: The spoke threads or nipple seat are corroded (from water, salt, or moisture). The corrosion "glues" the nipple to the spoke or rim.2. Thread locker: Someone applied thread locker (e.g., Loctite) to the spoke threads (not recommended - it makes future adjustments impossible).3. Stripped nipple flats: The nipple flats are rounded off (from using the wrong size wrench), so the wrench can't grip it.4. Spoke wind-up: The spoke is twisted so tightly that it's binding the nipple (the spoke is "wound up" like a spring).5. Internal nipple stuck: For internal nipples, the nipple may be stuck in the rim bed (from corrosion or sealant).

How to fix:1. Release spoke wind-up first: Pluck the spoke firmly or squeeze it with adjacent spokes. If the spoke is badly wound up, you may need to hold the spoke with a spoke holder while turning the nipple (in the opposite direction to release the wind-up).2. Lubricate the threads: Apply a small amount of penetrating oil (WD-40, PB Blaster, or a light oil like Triflow) to the spoke threads (at the nipple) and the nipple seat (where the nipple meets the rim). Let it sit for 5-10 minutes. Then try turning the nipple again.3. Use the correct size wrench: Ensure your spoke wrench fits the nipple properly (not too big, not too small). If the flats are slightly worn, a good quality wrench with a tight tolerance may still grip.4. Apply steady, firm pressure: Don't jerk or force the nipple (can break the spoke or strip the flats). Apply steady, firm pressure in the direction you want to turn. If it doesn't move, apply more lubricant and wait longer.5. For stripped nipple flats: If the flats are completely rounded, you'll need to replace the nipple. This requires removing the tire, tape, and spoke (or at least loosening the spoke enough to remove the nipple). If you're not comfortable doing this, take the wheel to a professional.6. For internal nipples: Use a magnetic nipple tool (inserted through the valve hole) to grip the nipple. If it's stuck, apply lubricant through the valve hole and wait. If it still won't turn, you may need to remove the tire and tape to access the nipple from the rim bed side.7. Last resort: If the nipple is completely seized and won't turn (even with lubricant and the correct tool), you may need to replace the spoke and nipple. This is more work but is sometimes necessary. If you're not comfortable replacing a spoke, take the wheel to a professional.

Prevention:- Lubricate spoke threads with a light oil or spoke prep when building or servicing a wheel. This prevents corrosion and makes future adjustments easier.- Don't use thread locker (Loctite) on spoke threads - it makes future adjustments impossible.- Use the correct size spoke wrench (don't use a wrench that's too big - it will strip the flats).- For wheels that will be ridden in wet/salty conditions, consider using brass nipples (more corrosion-resistant than aluminum) or applying a corrosion inhibitor to the spoke threads.

Problem 3: Wheel Has a "Hop" (Radial Runout) That Won't Go Away

Symptoms: The wheel has an up-and-down hop (radial runout) that you can't fix with spoke adjustment.

Possible causes:1. Damaged rim (dent or flat spot): The rim has a dent or flat spot from an impact (crash, pothole, rock strike). This creates a permanent radial high or low spot that spoke adjustment can't fully fix.2. Uneven spoke tension: Some spokes are much tighter/looser than others, causing the rim to be pulled in/out unevenly.3. Improper radial truing technique: You're only adjusting one side (instead of both sides equally), or you're making adjustments that are too large.4. Hub flange issue: The hub has a damaged flange (bent or cracked), causing the spokes to pull unevenly.5. Tire issue: The tire has a defect (lump, flat spot, or uneven casing) that looks like a wheel hop (but it's actually the tire).

How to fix:1. Check if it's the tire or the wheel: Remove the tire and spin the bare rim in the truing stand. If the hop is still there (with no tire), it's the wheel. If the hop goes away (with no tire), it's the tire (replace the tire).2. Inspect the rim for damage: Look carefully for dents, flat spots, cracks, or delamination. If you find damage, the rim may need replacement (especially if the damage is severe). A minor dent may be partially correctable with spoke adjustment, but it won't be perfect.3. Check spoke tension: Pluck all spokes and ensure even tension (similar pitch on each side). If some spokes are very loose/tight, balance the tension first (then re-check radial runout).4. Re-true radially with proper technique:- For a high spot (hop): Loosen BOTH left and right spokes at that spot by 1/4 turn each.- For a low spot (flat): Tighten BOTH left and right spokes at that spot by 1/4 turn each.- Always adjust both sides equally (don't just adjust one side - that introduces lateral runout).- Make small adjustments (1/4 turn at a time) and check after each.- Work on the largest high/low spot first, then move to smaller ones.5. Check the hub: Inspect the hub flanges for damage (bends, cracks, or broken spoke holes). If the hub is damaged, it needs replacement (the wheel can't be properly trued with a damaged hub).6. If the hop persists: If you've tried radial truing and tension balancing, and the hop is still there (>0.5mm for road, >1.0mm for MTB), the rim is likely damaged (dent or flat spot). You can either:- Ride it as-is (if the hop is small and doesn't affect braking or ride quality)- Replace the rim (if the hop is large or the rim is damaged)- Take it to a professional for evaluation (they may be able to repair a minor dent, or confirm that the rim needs replacement)

Problem 4: Spokes Keep Breaking (Repeated Spoke Failure)

Symptoms: You replace a broken spoke, true the wheel, but shortly after (a few rides or weeks), another spoke breaks (or the same one breaks again).

Possible causes:1. Uneven spoke tension: Some spokes are much tighter/looser than others. The loose spokes flex more (fatigue failure), and the tight spokes can break from over-tension.2. Damaged hub flange: The hub has a cracked or bent flange, causing the spokes to pull at an angle (stress concentration at the spoke bend, leading to fatigue failure).3. Improper spoke replacement: When you replaced the broken spoke, you didn't stress relieve it or balance the tension. The new spoke has different tension than the others, causing uneven loading.4. Rim damage: The rim has a crack or damaged nipple seat, causing the spoke to pull at an angle or the nipple to pull through.5. Over-tensioned wheel: All spokes are too tight (above the manufacturer's recommendation). This puts excessive stress on the spokes (especially at the bend), leading to fatigue failure.6. Poor quality spokes: The spokes are low quality (cheap, no-name brand) and prone to fatigue failure.7. Rider weight / riding style: Heavy riders (>90kg) or aggressive riders (hard sprints, jumps, drops) put more stress on spokes, leading to faster fatigue.

How to fix:1. Inspect the hub flange: Look carefully at the hub flanges (where the spokes attach) for cracks, bends, or elongated spoke holes. If the hub is damaged, it needs replacement (a damaged hub will keep breaking spokes).2. Inspect the rim: Look for cracks around the nipple seats, or nipples that are pulling through the rim. If the rim is damaged, it needs replacement.3. Check and balance spoke tension: Pluck all spokes (or use a tension meter) and ensure even tension. Tighten loose spokes, loosen tight spokes. Ensure all spokes are within the manufacturer's recommended tension range (not over-tensioned).4. Replace broken spokes with quality spokes: Use good quality spokes (e.g., Sapim CX-Ray, Pillar 1420/1423, DT Swiss Competition) that match the original spoke specification (length, gauge, bend type). Don't use cheap no-name spokes.5. Properly stress relieve after spoke replacement: After replacing a spoke and re-truing, stress relieve all spokes (squeeze pairs of parallel spokes firmly). This ensures the new spoke is properly seated and tensioned.6. Check rider weight / riding style: If you're a heavy rider (>90kg) or aggressive rider, ensure your wheels are built with appropriate spoke tension and spoke count (more spokes = stronger wheel). If your wheels have a low spoke count (16-20 spokes) and you're a heavy/aggressive rider, consider upgrading to a higher spoke count wheel (24-32 spokes).7. If spokes keep breaking: If you've replaced 2+ spokes and they keep breaking, there's likely a more serious problem (damaged hub or rim). Take the wheel to a professional for a full evaluation. They can check the hub, rim, tension, and spoke quality, and determine the root cause.

Prevention:- Ensure even spoke tension (check every 6-12 months).- Don't over-tension spokes (follow the rim manufacturer's recommendation).- Use quality spokes (Sapim, Pillar, DT Swiss) - they're more fatigue-resistant.- Stress relieve spokes after truing or spoke replacement.- For heavy/aggressive riders, use wheels with a higher spoke count (24+ spokes).- Avoid impacts (crashes, potholes, rock strikes) - they can damage the hub/rim and cause spoke breakage.

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When to Take It to a Professional

While home truing is possible (and rewarding), there are times when it's better to take the wheel to a professional bike shop or wheel builder:

1. Damaged rim: If the rim is cracked, dented, or delaminated, don't try to true it - take it to a professional for evaluation. Carbon rim repair is specialized and expensive (sometimes not possible). A professional can tell you if the rim is repairable or needs replacement.

2. Internal nipples: If your wheel has internal nipples (inside the rim bed), truing requires a magnetic nipple tool and special technique. If you're not comfortable with this, take it to a professional.

3. Carbon spoke wheels: If your wheel has carbon spokes (Bola PRM, PRO, EXT, or other carbon spoke models), they require special care and tools. Carbon spokes don't stretch like steel spokes, and they can be damaged by improper nipple tools or excessive tension. Take carbon spoke wheels to a professional (or follow the manufacturer's instructions very carefully).

4. Wheel building (from scratch): If you're building a wheel from scratch (hub, rim, spokes), this is much more complex than truing an existing wheel. It requires calculating spoke length, lacing pattern, tensioning sequence, etc. If you're a beginner, take it to a professional wheel builder (or take a wheel building class).

5. Repeated spoke breakage: If spokes keep breaking (2+ times), there's likely a serious problem (damaged hub/rim, uneven tension, poor quality spokes). A professional can diagnose the root cause and fix it properly.

6. High-value wheels: If you have expensive wheels (e.g., Bola EXP/CE/EXT, Zipp 454 NSW, ENVE SES), it's worth paying a professional to true them (to avoid accidental damage from improper technique). The cost of professional truing ($20-$50 per wheel) is small compared to the cost of replacing a damaged carbon rim ($500-$1500+).

7. If you're frustrated: If you've been working on the wheel for 30+ minutes and it's getting worse (not better), stop and take it to a professional. Sometimes a fresh set of eyes (and professional tools) can fix it in 10 minutes.

Cost of professional truing:- Basic truing (lateral + radial): $20-$40 per wheel- Truing + tension balancing: $30-$60 per wheel- Spoke replacement (including spoke): $20-$40 per spoke- Full wheel overhaul (true, tension, stress relieve, clean): $50-$100 per wheel- Wheel building (from scratch): $100-$200 per wheel (labor only, parts extra)

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FAQ

Q: How often should I true my carbon wheels?A: It depends on your riding style, weight, and the wheel quality, but here are general guidelines:

For road riding (smooth pavement, light rider <75kg):- Every 6-12 months (or when you notice brake rub or wobble)- High-quality carbon wheels (Bola, Zipp, ENVE) with good tension can go 12+ months without needing truing

For road riding (rough roads, heavy rider >85kg):- Every 3-6 months- Heavier riders and rough roads put more stress on wheels, causing them to go out of true faster

For gravel riding:- Every 3-6 months (gravel roads have more vibration and impacts than pavement)- If you ride very rough gravel (rocks, potholes), check every 1-3 months

For MTB riding:- Every 1-3 months (MTB riding has the most impacts and stress)- For aggressive riding (jumps, drops, enduro), check after every ride (or at least every 1-2 weeks)- For XC racing (smooth trails), every 2-3 months is usually fine

After a crash or hard impact:- Immediately (as soon as possible)- Impacts can knock the wheel out of true, break spokes, or damage the rim- Even if the wheel looks fine, inspect it carefully (spin it and check for wobble/hop, inspect for cracks/dents)

Signs your wheel needs truing (don't wait for a schedule):- Brake pads rub on the rim (rim brakes) intermittently- Rotor rubs on the pads (disc brakes) intermittently- Visible wobble when you spin the wheel- You hear a "tick" or "ping" from the spokes (loose spokes)- The wheel feels "soft" or flexy when riding- After a crash or hard impact

Pro tip: Make it a habit to spin your wheels and check for wobble every time you clean your bike (or every 2-4 weeks). This takes 30 seconds per wheel and helps you catch truing issues early (before they become serious or cause spoke breakage).

Q: Can I true a carbon wheel with a spoke wrench, or do I need special tools?A: You can true a carbon wheel with basic tools (spoke wrench + truing stand or zip ties), but there are some special considerations for carbon wheels:

Basic tools needed (for most carbon wheels with external nipples):- Spoke wrench (correct size - 3.2mm or 3.5mm): Essential. Must match your nipple size.- Truing stand (or bike frame + zip ties): Essential. A dedicated stand is best, but a frame + zip ties works well.- Dishing gauge (or use the frame/fork): Recommended. Ensures the rim is centered.- Spoke tension meter: Recommended (for professional-quality results). Ensures even tension.- Lubricant (light oil or spoke prep): Useful. Prevents spoke wind-up and corrosion.- Marker or tape: Useful. Marks high spots on the rim.

Special tools needed (for some carbon wheels):- Magnetic nipple tool (for internal nipples): If your wheel has internal nipples (inside the rim bed, common on deep section aero rims), you need a magnetic nipple tool that inserts through the valve hole. A standard external spoke wrench won't work.- Carbon spoke tools (for carbon spoke wheels): If your wheel has carbon spokes (Bola PRM, PRO, EXT, etc.), you may need special tools to hold the carbon spoke (to prevent twisting) while turning the nipple. Follow the manufacturer's instructions.- Nipple driver (for building wheels): If you're building a wheel from scratch (not just truing), you need a nipple driver to thread nipples onto spokes. Not needed for basic truing.

Special considerations for carbon wheels:1. Don't over-tension: Carbon rims have a maximum spoke tension rating (usually 100-140 kgf for road, 120-160 kgf for MTB). Exceeding this can crack the rim. Use a tension meter (or follow the rim manufacturer's recommendation) to ensure you don't over-tension.2. Be gentle with the rim: When handling the wheel (mounting in stand, marking high spots), don't squeeze or clamp the rim too hard. Carbon is strong but can be damaged by point loads.3. Don't use metal tools on the rim: When marking high spots or adjusting, don't use sharp metal tools that can scratch the carbon rim. Use a marker (for marking) or plastic tools (for leverage).4. Internal nipples require care: If your wheel has internal nipples, be careful not to drop the nipple inside the rim (it can be hard to retrieve). Use a magnetic tool that holds the nipple securely.5. Carbon spokes are different: If your wheel has carbon spokes, they don't stretch like steel spokes. Be very careful when tensioning - carbon spokes can break if over-tensioned. Follow the manufacturer's instructions exactly.

Bottom line: For most carbon wheels (with external brass/aluminum nipples), you only need a spoke wrench + truing stand (or zip ties) to true them. The technique is the same as for aluminum wheels - just be careful not to over-tension (carbon rims are more sensitive to excessive tension). If your wheel has internal nipples or carbon spokes, you may need special tools - check the manufacturer's instructions or take it to a professional.

Q: What's the difference between lateral and radial truing?A: Lateral and radial truing address two different types of wheel runout (wobble):

Lateral truing (side-to-side):- What it fixes: Side-to-side wobble of the rim (when you spin the wheel, the rim moves left and right).- How you adjust it: By tightening/loosening spokes on one side (left or right) to pull the rim in the desired direction.- If the rim is pulled left, tighten the right spokes and/or loosen the left spokes (pulls rim right).- If the rim is pulled right, tighten the left spokes and/or loosen the right spokes (pulls rim left).- Why it matters: Lateral runout causes brake pad rub (rim brakes) or rotor rub (disc brakes, if the rotor is also out of true). It also affects handling (the wheel feels "wobbly").- Tolerance: <0.3mm for road, <0.5mm for MTB.- Difficulty: Easier to learn (the effect of each adjustment is more visible).

Radial truing (up-and-down / roundness):- What it fixes: Up-and-down hop or flat spot of the rim (when you spin the wheel, the rim moves up and down relative to the hub).- How you adjust it: By tightening/loosening BOTH left and right spokes equally at a given spot.- If there's a high spot (hop), loosen both left and right spokes at that spot (allows rim to move outward, reducing the hop).- If there's a low spot (flat), tighten both left and right spokes at that spot (pulls rim inward, reducing the flat spot).- Why it matters: Radial runout causes a "bouncy" ride (you can feel the hop through the saddle/handlebars). It also affects braking consistency (the gap between brake pads and rim changes as the wheel spins).- Tolerance: <0.5mm for road, <1.0mm for MTB.- Difficulty: Harder to learn (the effect is less visible, and it's easy to introduce lateral runout if you don't adjust both sides equally).

Key differences:| Feature | Lateral Truing | Radial Truing ||---|---|---|| Direction | Side-to-side (left/right) | Up-and-down (in/out) || Spokes adjusted | One side (left OR right) | Both sides (left AND right, equally) || Effect on overall tension | None (if you tighten one side and loosen the other) | Changes overall tension (tightening both = more tension, loosening both = less) || Difficulty | Easier | Harder || Visibility | More visible (easy to see wobble) | Less visible (harder to see hop) || Common cause | Uneven left/right tension | Uneven overall tension, rim damage |

How they interact:- Lateral and radial truing are independent (you can adjust one without affecting the other, if done correctly).- However, if you make a mistake during radial truing (e.g., tighten the left spoke more than the right), you'll introduce lateral runout.- Similarly, if you make a mistake during lateral truing (e.g., tighten the right spoke but forget to loosen the left), you'll change the overall tension, which can affect radial truing.- Best practice: True laterally first (easier), then radially (harder), then re-check lateral (radial adjustments may have introduced slight lateral runout), then fine-tune both.

For beginners: Focus on lateral truing first (it's easier and more noticeable). Once you're comfortable with lateral truing, try radial truing. If radial truing seems too difficult, take the wheel to a professional (it's worth the cost for a round wheel).

Q: How do I know if my spokes are at the right tension?A: There are two ways to check spoke tension: by ear (plucking) and with a tension meter (more accurate).

Method 1: By ear (plucking) - quick and qualitative1. Pluck each spoke (like a guitar string) with your fingernail or a spoke wrench.2. Listen to the pitch:- Spokes with similar tension have similar pitch (like strings on a guitar).- A higher pitch = tighter spoke.- A lower pitch = looser spoke.3. Compare spokes on the same side:- All left-side spokes should have similar pitch.- All right-side spokes should have similar pitch.- Left and right sides may have different pitch (especially on rear wheels, where the drive side is tighter). This is normal.4. What to listen for:- A spoke that sounds significantly lower (looser) than the others on the same side 鈫?needs tightening.- A spoke that sounds significantly higher (tighter) than the others 鈫?needs loosening.- A "thud" or "dull" sound (instead of a clear "ping") 鈫?the spoke is very loose (or the spoke is damaged/cracked).5. Limitations:- This is qualitative (you can tell if a spoke is loose/tight relative to others, but you can't tell the exact tension in kgf).- It takes practice to learn to hear the differences.- Different spoke materials (steel vs carbon) and shapes (round vs bladed) have different sounds, even at the same tension.- You can't tell if the overall tension is too high or too low (only if it's uneven).

Method 2: With a tension meter - accurate and quantitative1. Choose a tension meter: Popular models include the Park Tool TM-1, DT Swiss Tensio, and Wheelsmith tensiometer. Prices range from $30 (Park TM-1) to $150+ (professional models).2. Calibrate/zero the meter: Follow the manufacturer's instructions to zero the meter (usually by adjusting a screw until the needle reads zero with no load).3. Measure each spoke:- Clamp the tension meter onto the middle of the spoke (away from the nipples and hub, where the spoke is straight).- Read the meter value (usually a number on a scale, e.g., 10-30 on the Park TM-1).- Record the value for each spoke (or at least the ones that seem loose/tight).4. Convert to actual tension (kgf):- The meter reading is not the actual tension - you need to convert it using the manufacturer's conversion chart.- The conversion depends on:- Spoke material (steel, stainless steel, carbon)- Spoke gauge (thickness - e.g., 2.0mm, 1.8mm, 1.5mm)- Spoke shape (round, bladed, oval)- For example: On a Park TM-1, a reading of 20 on a 2.0mm round steel spoke = ~120 kgf. The same reading on a 1.5mm bladed spoke = ~80 kgf.- Check the tension meter's manual for the conversion chart (or download it from the manufacturer's website).5. Compare to the rim manufacturer's recommendation:- Check the rim manufacturer's website or documentation for the maximum recommended spoke tension.- Typical ranges:- Road rims: 100-140 kgf (depending on rim depth and material)- Gravel rims: 110-150 kgf- MTB rims: 120-160 kgf (higher for heavier riders/aggressive riding)- Important: Don't exceed the maximum recommended tension - it can crack the carbon rim.6. Check for even tension:- All spokes on the same side should be within 10% of each other (e.g., if most are 120 kgf, none should be below 108 or above 132 kgf).- Left and right sides may have different tension (normal, especially on rear wheels).- If there's more than 10% variation, balance the tension (tighten loose spokes, loosen tight spokes).

Recommended tension for Bola carbon wheels:- Road wheels (CLA/ELT/ULT/SL/ST/PRM/PRO/EXP/CE/EXT): 110-130 kgf (drive side rear / both sides front), 80-100 kgf (non-drive side rear)- Gravel wheels: 110-140 kgf (depending on rim width and rider weight)- MTB wheels: 120-150 kgf (depending on rim width and riding style)- Carbon spoke wheels (PRM/PRO/EXT): Follow the specific manufacturer's recommendation (carbon spokes have different tension characteristics than steel spokes)- Note: These are general guidelines - always check the specific rim model's documentation for the exact recommended tension. When in doubt, contact Bola (info@bolacarbon.com) for the recommended tension for your specific wheel model.

Bottom line: For home mechanics, plucking (by ear) is sufficient for most truing jobs (you can tell if tension is uneven). For a professional-quality wheel build or if you're having repeated spoke breakage, invest in a tension meter ($30-$150) and learn to use it. Even tension is the key to a durable, long-lasting wheel.

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Ready to True Your Wheels?

Visit bolacarbon.com to browse Bola's full carbon wheelset lineup - all Bola carbon wheels are hand-built with precision tensioning and stress relieving, so they arrive true and ready to ride.

All Bola carbon wheels include:- Hand-built with quality spokes (Pillar 1420/1423, Sapim CX-Ray, or carbon spokes)- Precision tensioning (even spoke tension, within manufacturer's range)- Stress relieved (spokes properly seated, no wind-up)- Lateral runout <0.2mm, radial runout <0.3mm (factory spec)- Quality hubs (Bola 54T, Ceramic Hub, DT Swiss 350s/240S)- ISO 4210, UCI certified- 2-year warranty + 50% crash replacement- Free worldwide shipping on orders over $500

Need wheel truing supplies? Contact our engineering team at info@bolacarbon.com for recommendations on:- Spoke wrenches (correct size for your nipples - 3.2mm or 3.5mm)- Truing stands (budget to professional)- Spoke tension meters (Park TM-1, DT Swiss Tensio, etc.)- Dishing gauges- Replacement spokes (Sapim CX-Ray, Pillar 1420/1423, matching your wheel's spec)- Replacement nipples (brass or aluminum, correct size)- Spoke prep / lubricant

Remember:- Make small adjustments (1/4 turn at a time)- Release spoke wind-up after each adjustment (pluck the spoke)- Adjust both sides equally for radial truing- Check spoke tension (by plucking or tension meter) and balance it- Stress relieve all spokes after truing (squeeze pairs of parallel spokes)- Don't over-tension (follow the rim manufacturer's recommendation - can crack carbon)- Don't true a damaged rim (cracked/dented/delaminated - needs replacement)- Take it to a professional if you're unsure (especially for internal nipples or carbon spokes)

Happy (and true) riding!

Ready to Upgrade Your Wheels?

Explore Bola's complete carbon wheel collection and find the perfect match for your riding style and budget:

• Bola ULT 45G Carbon Gravel Wheelset - $698.00
• Bola SL 45G Carbon Gravel Wheelset (DT Swiss 350S) - $789.00
• Bola ULT 45R Carbon Road Wheelset - $698.00
• Bola SL 45R Carbon Road Wheelset (DT Swiss 350S) - $789.00
• Gravel Wheels - full collection
• Road Wheels - full collection

All Bola wheelsets include: tubeless tape + valves, 2-year warranty, crash replacement program (50% off), and free worldwide shipping on orders over $500. Have questions about which wheelset is right for you? Contact our engineering team at info@bolacarbon.com.