BOLA 29er Asymmetric Carbon MTB Rim | 38mm Wide, 32mm Internal
BOLA 29er Asymmetric Carbon MTB Rim | 38mm Wide, 32mm Internal
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The Bola 29" asymmetric hookless carbon MTB rim — a 32mm internal, 23mm-low-profile hoop (325-385g) built for XC and all-mountain.
A 23mm profile keeps rotational inertia low while a 32mm inner channel stabilizes 2.3"-2.5" tires. This asymmetric 29er Bola rim is built for XC race efforts and all-mountain days alike.
Buying Guide.
Weight tier - Superlight ~325g: the Ultralight race build - drops about 60g for XC climbs and acceleration, with a slimmer impact margin.
Weight tier - Standard ~385g: the Light-grade structural-margin build - choose it for all-mountain days where a landed jump matters more than grams.
Tire & terrain: the low-profile channel stabilizes 2.3-2.5" tires - build it for XC race and all-mountain; very narrow or very wide rubber falls outside its sweet spot.
Same-family: this is the lowest-profile wide rim in the 29er line - favour it when climbs and acceleration outrank enduro support; the taller 30mm-profile 30/34mm rims are the trail/enduro choice.
Rider limit 100kg - keep rider plus kit inside it.
Target Audience & Usage Notes.
XC racing, trail and all-mountain; bikepacking capable.
Rider limit 100kg; not for DH or heavy freeride.
Disc only.
The Ride That Awaits.
Lean into a climb and the low profile flips over like a feather - wide enough to steady your tire, light enough to keep your legs fresh. The offset bed evens the pull, so the wheel stays true lap after lap on XC and all-mountain days. Pick the superlight layup; a 3-year rim warranty backs the build, rider weight up to 100kg.
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- Material: carbon
- Rim depth: 23 mm
- External width: 38 mm
- Internal width: 32 mm
- Size: 29 in
- Profile: U-shaped
- Weight Tier: Standard 385g / Superlight 325g
- Max Tire Pressure: 75 psi
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- Weight vs Durability: Standard at 385g provides more structural margin for aggressive riding, while Superlight at 325g offers lower rotational mass for XC racing. Choose based on your priority between durability and speed.
- Tire Volume vs Speed: With 32mm internal width, this rim supports 2.3-2.5" tires, maximizing traction and comfort at the expense of slightly higher rolling resistance compared to narrower rims.
- Stiffness vs Compliance: The asymmetric design and 23mm profile deliver high lateral stiffness for efficient power transfer, but may feel less compliant on rough terrain than deeper or more flexible rims.
- Price vs Grade: Offers competitive pricing for a carbon rim with customizable options, but lacks the premium branding and extensive testing of top-tier competitors.
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- Fatigue Test: 750,000 cycles @640N (ISO 4210-7 Annex A, informative only)
- Impact Resistance: >40J (ISO 4210-7 reference)
- Flatness: <0.25mm (internal QC)
- Roundness: <0.3mm (internal QC)
- Max Spoke Tension: >300kg (internal QC)
- Ultimate Strength: >100kg (internal QC)
- Dynamic Equilibrium: <3g (internal QC)
- Radial Stiffness: 90–110 N/mm (internal lab)
- Lateral Stiffness: ≥8N/mm
- Max System Weight: 100kgs
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- XC Racing: Excellent. The Superlight variant at 325g and low profile is ideal for climbing and acceleration in cross-country racing.
- Trail Riding: Good. The standard variant at 385g provides durability, and the 32mm inner width gives stable tire support for trail conditions.
- All-Mountain: Suitable. Reinforced structure and asymmetric design handle varied terrain, but not for extreme downhill.
- Bikepacking: Suitable. Tubeless ready and comfortable with larger tires, but weight may be a consideration for long tours.
- Not Recommended For: Not recommended for downhill or heavy-duty freeride due to max rider weight of 100kg and intended XC/AM use.
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- Frame Compatibility: 29" mountain bike frames and forks designed for 29" wheels and disc brakes.
- Tire Type: Tubeless-ready clincher tires.
- Tire Width Range: 2.3" - 2.5"
- Brake Standard: Disc brake only (no brake track).
- Drivetrain: Not applicable (rim only).
- Rotor Standard: Not applicable (rim only).
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|---|---|---|---|---|---|---|---|
| Asymmetric Hookless | N/A | N/A | N/A | 325-385 g | 23 mm | 32 mm | see store |
| XC Carbon Rim | N/A | N/A | N/A | ~360 g | 23 mm | 32 mm | ~$200 |
| AM Carbon Rim | N/A | N/A | N/A | ~380 g | 23 mm | 32 mm | ~$230 |
| Trail Carbon Rim | N/A | N/A | N/A | ~350 g | 23 mm | 32 mm | ~$180 |
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What tubeless setup does this rim require?
This rim is hookless and tubeless-ready. You need to use tubeless-compatible tires and sealant. The recommended operating tire pressure is between 45-65 psi. Proper tape and valve installation is essential to avoid leaks.
What tire compatibility does this rim have?
The rim has a 32mm internal width and is designed for tubeless tires from major brands. It supports tire widths from 2.3 to 2.5 inches, providing optimal traction and cornering stability.
What are the weight savings of the Superlight version?
The Superlight variant weighs approximately 60g less per rim compared to the Standard version (325g vs 385g). This reduces rotational mass, improving acceleration and climbing efficiency, ideal for XC racing.
Can this rim be customized for specific builds?
Yes, spoke hole diameter, valve hole, assembly hole, nipple angles, and spoke counts are customizable for private-label or specific wheel builds. OEM support is available for tailored requirements.
How should I maintain and inspect this carbon rim for damage?
Regularly check for impact damage, delamination, or cracks after rides. Clean with mild soap and water, avoid harsh chemicals. Ensure spoke tension is within limits and inspect the bead seat for wear. Follow the warranty guidelines for structural defects.
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