Hookless Rims for Gravel: Risks and Best Practices

Hookless rims (also called "tubeless-only" or "straight-side" rims) have become increasingly popular in gravel and road cycling. Brands like Zipp, ENVE, Cadex, and others have embraced hookless technology for its weight savings, aerodynamic benefits, and improved impact resistance. But hookless rims also come with significant trade-offs - limited tire choices, maximum pressure limits, and the risk of tire blow-off if used incorrectly. This engineering-level guide explains how hookless rims work, their advantages and risks for gravel riding, tire compatibility, and best practices for safe and effective use.

Related: Gravel & All-Road Carbon Wheelsets Complete Buying Guide

Related: Gravel & All-Road Carbon Wheelsets Buying Guide

What Are Hookless Rims?

A "hooked" rim (the traditional design) has a small hook or lip on the inner edge of the rim sidewall that retains the tire bead. The tire bead sits under this hook, which prevents the tire from blowing off the rim at high pressure.

A "hookless" rim has no hook - the rim sidewall is straight (or slightly tapered) with a flat top. The tire bead is retained by:

1. The tire bead's own tension and stiffness: Modern tubeless tires have a strong, stiff bead (usually made of aramid/Kevlar or carbon) that resists stretching.
2. The rim bead seat design: Hookless rims have a precisely shaped bead seat (often with a small channel or "bead lock") that holds the tire bead in place.
3. Air pressure: The air pressure inside the tire pushes the bead outward against the rim sidewall, creating a friction fit that holds the bead in place.

Hookless rims are designed to be used only with tubeless tires (no inner tubes). The tubeless tire's stiff bead and the air pressure create a secure seal. Using a tube-type clincher tire on a hookless rim is not recommended - the bead may not be stiff enough to stay seated, and the tube can create friction that weakens the bead seal.

The ETRTO Hookless Standard

In 2021, the European Tyre and Rim Technical Organisation (ETRTO) published a standard for hookless rims (also called "TSS" - Tubeless Straight Side). The standard defines:

• Rim dimensions: Precise specifications for rim bead seat diameter, width, and profile to ensure consistent tire fitment.
• Maximum pressure limit: 72 PSI (5.0 bar / 500 kPa) - this is the maximum pressure at which a tire is guaranteed to stay seated on a hookless rim, per the ETRTO standard. This limit applies regardless of the tire's stated maximum pressure.
• Tire compatibility: Only tires that are explicitly certified for hookless rims (marked "hookless compatible" or "TSS compatible" by the manufacturer) should be used on hookless rims. Using non-certified tires is at your own risk.
• Safety factor: The 72 PSI limit includes a safety margin - tires are tested to ensure they don't blow off at pressures up to 1.5x the limit (108 PSI) under static conditions. But dynamic conditions (cornering, impacts, heat) can reduce the safety margin.

Important: The 72 PSI ETRTO limit is for road and all-road hookless rims. For gravel hookless rims (with wider internal widths, typically 25mm+), the practical pressure limit is even lower (40-55 PSI, depending on tire size) because wider tires exert more force on the bead at a given pressure. Always follow the rim and tire manufacturer's specific pressure recommendations - don't assume the 72 PSI road limit applies to gravel hookless rims.

Advantages of Hookless Rims for Gravel

1. Weight Savings

Hookless rims eliminate the material needed for the hook (the folded-over lip on the rim sidewall). This saves approximately 20-40g per rim, or 40-80g per wheelset. For weight-conscious gravel racers and climbers, this is a meaningful reduction - equivalent to a lightweight water bottle or a carbon saddle upgrade. The weight savings are most significant on wide rims (where the hook material is more substantial).

2. Aerodynamic Benefits

Hookless rims have a smoother, more aerodynamic sidewall profile - there's no abrupt hook edge to disrupt airflow. The tire also mounts flush with the rim sidewall (no step between the rim and tire), creating a smoother transition that reduces aerodynamic drag. Independent wind tunnel testing (Swiss Side, AeroCoach) shows that hookless rims with properly matched tires can save 1-3 watts compared to hooked rims of the same depth and width. At gravel racing speeds (30-40 km/h on fast sections), this is a small but meaningful benefit.

3. Improved Impact Resistance

This is the biggest advantage for gravel riding. The hook on a traditional rim is a stress concentration point - when you hit a rock or pothole, the impact force is concentrated at the hook, which can crack or split the rim sidewall. Hookless rims have no hook, so the impact force is distributed more evenly across the rim sidewall. This makes hookless rims significantly more resistant to impact damage (cracks, dents, splits) from rocks and potholes - exactly the kind of impacts you encounter on gravel roads.

Independent testing (including ENVE's impact testing protocol) shows that hookless rims can withstand 20-40% more impact force than equivalent hooked rims before cracking. For gravel riding, this is a significant durability benefit - fewer cracked rims, fewer race-ending mechanicals.

4. Better Tire Profile and Ride Quality

Hookless rims allow the tire to mount with a more rounded, uniform profile (no hook to constrict the tire bead). This creates a wider, more even contact patch, which improves traction and cornering grip. The lack of a hook also allows the tire sidewall to flex more naturally, which can improve ride quality (comfort) on rough terrain. Some riders also report that hookless rims provide a more "planted" feel in corners - the tire doesn't have the hook edge to dig into, so it transitions more smoothly from upright to leaned-over.

5. Simpler Manufacturing (Potential Cost Savings)

Hookless rims are simpler to manufacture - no need to fold the rim sidewall into a hook shape. This can reduce manufacturing costs and improve quality control (fewer defects in the hook area). In practice, most hookless rims are currently premium-priced (because they're a new technology), but as adoption increases, prices may come down.

Risks and Disadvantages of Hookless Rims for Gravel

1. Tire Blow-Off Risk (The Biggest Risk)

This is the most serious risk with hookless rims. If the tire pressure exceeds the safe limit (72 PSI for road, lower for gravel), or if the tire is not properly seated, the tire bead can "blow off" the rim - the tire suddenly separates from the rim, causing rapid deflation. This is extremely dangerous at speed - it can cause a crash, especially in a corner or at high speed.

Factors that increase blow-off risk:

• Exceeding the maximum pressure limit: The #1 cause. Never exceed the rim manufacturer's stated maximum pressure (usually 72 PSI for road hookless, 40-55 PSI for gravel hookless).
• Using non-certified tires: Tires not designed for hookless rims may have beads that are too flexible or the wrong shape, increasing blow-off risk.
• Heat buildup: On long descents (especially with rim brakes), heat can build up in the rim and tire, increasing air pressure and softening the tire bead. This is less of an issue with disc brakes (which don't heat the rim), but still a concern on very long, steep descents.
• Hard cornering: Aggressive cornering exerts significant lateral force on the tire bead, which can cause the bead to unseated. This is especially risky with non-certified tires or at high pressures.
• Impacts: A hard impact (rock, pothole) can momentarily deform the rim and tire, causing the bead to unseated. This is less likely with hookless than hooked (because there's no hook to fail), but still possible with very hard impacts.
• Improper installation: If the tire bead is not fully seated in the rim bead seat (all the way around), the tire may blow off even at normal pressures. Always verify that the bead is evenly seated all the way around before riding.

2. Limited Tire Choices

This is the biggest practical disadvantage. Hookless rims can only be used with tires that are explicitly certified for hookless use by the tire manufacturer. As of 2027, the list of hookless-compatible gravel tires is growing but still limited compared to the full range of gravel tires available for hooked rims.

Hookless-compatible gravel tires (as of 2027, partial list):

• Panaracer GravelKing (all sizes, including Slick, SS, Riddler patterns) - most sizes are hookless-certified
• WTB Riddler, Resolute, Byway, Sendero - most sizes hookless-certified
• Maxxis Receptor, Rambler, Aspen, Ardent Race - select sizes hookless-certified
• Specialized Pathfinder Pro, Roubaix Pro, Tracer - select sizes hookless-certified
• Schwalbe G-One Allround, G-One R, G-One Bite - select sizes hookless-certified
• Pirelli Cinturato Gravel H, M, RC - select sizes hookless-certified
• Continental Terra Speed, Terra Trail, Terra Hardpack - select sizes hookless-certified
• Vittoria Terreno Dry, Terreno Mix, Terreno Wet - select sizes hookless-certified

Important: Always check the tire manufacturer's website or packaging for hookless certification. A tire that is hookless-certified in one size may NOT be certified in another size. And a tire that is NOT certified should NOT be used on a hookless rim - even if it "fits" physically. Using non-certified tires increases blow-off risk and may void your wheel warranty.

3. Maximum Pressure Limit

As discussed, hookless rims have a maximum pressure limit (72 PSI for road ETRTO standard, lower for gravel - typically 40-55 PSI depending on rim width and tire size). This is not a problem for most gravel riding (where pressures are typically 25-45 PSI anyway), but it can be a limitation if:

• You're a heavy rider (90kg+) who needs higher pressures to avoid bottoming out the tire on impacts.
• You're using narrow gravel tires (32-35c) that require higher pressures.
• You're riding with heavy loads (bikepacking, touring) that require higher pressures.

In these cases, a hooked rim may be a better choice - hooked rims can safely handle higher pressures (up to 100-120 PSI, depending on the tire and rim).

4. No Tube Option

Hookless rims are designed for tubeless use only. You cannot (or should not) use an inner tube with a hookless rim. The tube creates friction against the rim sidewall that can weaken the tire bead seal, and the tube can also get pinched between the tire bead and rim sidewall during installation. If you get a flat that sealant can't fix (e.g., a large sidewall cut), you can't just install a tube and keep riding - you'll need to boot the tire and reinflate with sealant, or replace the tire. This is a consideration for remote gravel rides where you might be far from help.

Emergency workaround: In an emergency, you CAN install a tube in a hookless rim - but you must run very low pressure (20-30 PSI) and ride very carefully (no hard cornering, no high speeds). The tube is not a long-term solution - replace the tire or wheel as soon as possible. Some manufacturers explicitly warn against using tubes in hookless rims and may void the warranty if you do so.

5. Installation Can Be Tricky

Installing tires on hookless rims can be more difficult than on hooked rims, especially for tight-fitting tires. Without a hook to guide the bead into place, you need to ensure the bead is fully and evenly seated in the rim bead seat all the way around. This often requires a tubeless booster pump or compressor to get enough air volume to seat the bead. Some tight-fitting tires may require tire levers (use plastic levers, not metal - to avoid damaging the carbon rim) and a lot of patience.

Tip: Use soapy water on the tire bead and rim sidewall to make installation easier. The soap reduces friction and helps the bead slide into place. Also, ensure the tire bead is in the "center channel" of the rim (the deepest part) during installation - this gives you more slack to work with.

6. Compatibility with Rim Brakes

Hookless rims are generally NOT compatible with rim brakes. The hookless rim sidewall doesn't have a proper brake track surface (the sidewall is designed for tire bead retention, not braking). Using rim brakes on a hookless rim can cause: (1) poor braking performance (the sidewall may not have the proper texture or hardness for brake pads), (2) accelerated rim wear (the sidewall may not be designed to withstand brake pad friction), (3) heat buildup (braking heat can weaken the tire bead seal, increasing blow-off risk), and (4) potential rim failure (the sidewall may crack or delaminate under braking heat and friction).

Hookless rims are designed for disc brakes only. If you have a rim brake bike, do not use hookless rims - use hooked rims with a proper brake track.

Hookless vs Hooked: Which Is Better for Gravel?

Factor	Hookless Rims	Hooked Rims	Winner for Gravel
Weight	Lighter (20-40g/rim saved)	Heavier (hook material adds weight)	Hookless
Aerodynamics	Better (smoother sidewall, flush tire interface)	Good (but hook edge creates minor turbulence)	Hookless (small margin)
Impact resistance	Better (no hook stress concentration)	Good (but hook is a weak point)	Hookless (significant margin)
Tire choices	Limited (only hookless-certified tires)	Unlimited (any clincher/tubeless tire)	Hooked (significant margin)
Maximum pressure	Limited (72 PSI road, 40-55 PSI gravel)	High (up to 100-120 PSI depending on tire)	Hooked
Tube compatibility	Tubeless only (tubes not recommended)	Tubeless or tubes (both work)	Hooked
Blow-off risk	Higher (if pressure exceeded or non-certified tire used)	Lower (hook retains bead securely)	Hooked
Installation ease	Trickier (requires careful bead seating)	Easier (hook guides bead into place)	Hooked
Brake compatibility	Disc only (not compatible with rim brakes)	Disc or rim (both work)	Hooked
Cost	Currently premium-priced (new technology)	Wide range (budget to premium)	Hooked (for budget)
Durability (long-term)	Better (no hook to crack or wear)	Good (but hook can wear or crack over time)	Hookless
Ride quality/comfort	Better (tire flexes more naturally)	Good (but hook can constrict tire sidewall)	Hookless (small margin)

Who Should Choose Hookless for Gravel?

• Gravel racers who want every possible advantage (weight, aero, impact resistance) and are willing to deal with limited tire choices.
• Riders who frequently encounter rough, rocky terrain where impact resistance is critical (hookless rims are more resistant to rim cracks from rock impacts).
• Weight weenies who want the lightest possible wheelset (hookless saves 40-80g per set).
• Disc brake riders (hookless is disc-only - if you have rim brakes, hooked is your only option).
• Riders who are comfortable with tubeless setup and are willing to carefully select hookless-certified tires and follow pressure limits.

Who Should Choose Hooked for Gravel?

• Casual gravel riders who want maximum tire choice and flexibility (any tire, any pressure, tubes or tubeless).
• Heavy riders (90kg+) or riders carrying heavy loads (bikepacking) who need higher pressures than hookless limits allow.
• Riders on a budget (hooked rims are available at all price points, from budget to premium).
• Rim brake riders (hookless is not compatible with rim brakes).
• Riders who want the option to use tubes (e.g., for remote rides where a tube is a reliable backup).
• Riders who are nervous about tire blow-off and want the security of a hook retaining the tire bead.
• Riders who want to use a specific tire that is not hookless-certified (many popular gravel tires are still not certified for hookless).

Best Practices for Hookless Gravel Riding

If you choose hookless rims for gravel, follow these best practices to minimize risk and maximize performance:

1. Use Only Hookless-Certified Tires

This is non-negotiable. Only use tires that are explicitly certified for hookless rims by the manufacturer. Check the tire packaging, manufacturer website, or contact the manufacturer to confirm hookless compatibility for your specific tire size. Using non-certified tires increases blow-off risk and may void your wheel warranty. When in doubt, don't use it.

2. Never Exceed the Maximum Pressure

Always check the rim manufacturer's stated maximum pressure for your specific rim and tire size. For gravel hookless rims, this is typically 40-55 PSI (depending on rim width and tire size). Never exceed this limit - even if the tire says it can handle higher pressures. The hookless rim's pressure limit is the controlling factor. Use a precision pressure gauge to verify pressure before every ride.

3. Verify Bead Seating Before Every Ride

Before riding, visually inspect the tire bead all the way around both sides of the rim. The bead should be evenly seated in the rim bead seat - there should be no low spots, bulges, or areas where the bead is not fully seated. If you see any irregularity, deflate the tire, reseat the bead, and reinflate. A poorly seated bead is the #1 cause of tire blow-off (even at normal pressures).

4. Use a Tubeless Booster Pump or Compressor

For initial tire installation and seating, use a floor pump with a tubeless booster (air chamber) or an air compressor. The rapid air volume helps pop the bead into place evenly. A regular floor pump may not provide enough air volume to seat the bead properly, especially with tight-fitting tires. If you're having trouble seating the bead, try: (1) more soapy water on the bead and rim, (2) wrapping the tire with a strap or zip tie to compress the bead toward the rim, (3) removing the valve core for maximum airflow, or (4) using a CO2 inflator for a rapid burst of air.

5. Carry Appropriate Repair Gear

For hookless gravel riding, carry: (1) tubeless sealant (small bottle for topping up), (2) tire boot (for sidewall cuts - a dollar bill or energy bar wrapper works), (3) spare tube (for emergency use only - run very low pressure if you have to use a tube), (4) CO2 inflator or mini pump with enough capacity for gravel tire volumes, (5) tire levers (plastic, not metal), and (6) a small bottle of soapy water (for emergency tire reseating).

6. Avoid Hard Cornering at High Pressure

Hard cornering exerts lateral force on the tire bead, which can cause unseating (blow-off). This is especially risky at higher pressures (near the limit) and with non-certified tires. When cornering on hookless rims: (1) keep pressures within the recommended range (don't max out the pressure), (2) avoid aggressive, high-speed cornering on rough or loose surfaces, (3) lean the bike (not just your body) to reduce lateral force on the tire bead, and (4) if you feel the tire squirm or roll in a corner, ease off - that's a warning sign that the bead is under stress.

7. Monitor Heat on Long Descents

While disc brakes don't heat the rim directly (unlike rim brakes), long, steep descents can still cause heat buildup in the tire and rim from: (1) brake rotor heat radiating to the rim (especially with close-tolerance rotors and hubs), (2) tire flex and friction generating heat, and (3) ambient heat on hot days. Heat increases air pressure (approximately 1 PSI per 10 degreesF / 5.5 degreesC) and softens the tire bead, increasing blow-off risk. On long descents: (1) avoid riding at the maximum pressure limit (give yourself a 5-10 PSI buffer), (2) periodically check the tire for heat (carefully touch the tire sidewall - if it's too hot to touch, stop and let it cool), and (3) avoid prolonged, hard braking (which generates more heat) - use pulse braking or drag braking techniques.

8. Inspect Rims Regularly for Damage

While hookless rims are more impact-resistant than hooked rims, they're not indestructible. After hard impacts (rock strikes, potholes, crashes), inspect the rim sidewall carefully for: (1) cracks or splits in the carbon, (2) dents or deformations in the rim profile, (3) delamination (separation of carbon layers), (4) exposed carbon fibers (fraying), and (5) uneven or damaged bead seat. If you find any damage, stop riding immediately - a damaged hookless rim can cause sudden tire blow-off. Contact the manufacturer for warranty evaluation or replacement.

9. Don't Use Rim Brakes on Hookless Rims

This is a safety issue, not a performance issue. Hookless rims are not designed for rim brakes - the sidewall is not a proper brake track, and braking heat can cause tire blow-off or rim failure. If you have a rim brake bike, use hooked rims with a proper brake track. Do not attempt to use hookless rims with rim brakes under any circumstances.

10. Follow the Manufacturer's Recommendations

Every hookless rim manufacturer has specific recommendations for: (1) maximum pressure (by rim model and tire size), (2) compatible tires (some manufacturers maintain a list of tested and approved tires), (3) installation procedures, (4) maintenance and inspection, and (5) warranty terms. Always follow the manufacturer's specific recommendations - they know their product best. If you're unsure about anything, contact the manufacturer's customer support before riding.

Bola Wheels and Hookless Technology

As of 2027, Bola's standard road and gravel wheelsets (CLA, ELT, ULT, SL, ST, PRM, PRO, EXP, CE, EXT, and gravel models) use hooked rim design (traditional hooked bead). This is a deliberate choice to provide:

• Maximum tire compatibility: Any clincher or tubeless tire works - no need to worry about hookless certification.
• Higher pressure capacity: Safe for heavy riders and high-pressure road tires.
• Tube or tubeless flexibility: Use tubes or tubeless - both work reliably.
• Proven reliability: Hooked rims have been used for decades and are a known, reliable technology.
• Disc and rim brake compatibility: Bola offers both disc brake and rim brake models (rim brake models have a proper brake track).

Bola is actively researching hookless technology for future product development. If you're interested in a custom hookless gravel wheelset, contact Bola's engineering team at info@bolacarbon.com to discuss custom build options and availability.

Frequently Asked Questions

Q: Are hookless rims safe for gravel riding?

Yes, hookless rims are safe for gravel riding - IF you follow the rules: (1) use only hookless-certified tires, (2) never exceed the maximum pressure limit, (3) verify proper bead seating before every ride, (4) use disc brakes only, and (5) inspect rims regularly for damage. Hookless rims are actually MORE impact-resistant than hooked rims (no hook stress concentration), which is a significant advantage for gravel. The main risk is tire blow-off, which is almost always caused by exceeding the pressure limit or using non-certified tires. If you follow the rules, hookless rims are safe and reliable for gravel.

Q: What happens if a tire blows off a hookless rim while riding?

A tire blow-off on a hookless rim causes rapid, sudden deflation - the tire separates from the rim and all the air escapes almost instantly. This is very different from a slow puncture (where you have time to react and stop). A sudden blow-off at speed can cause a crash, especially in a corner or on a descent. The front wheel is more dangerous than the rear - a front blow-off can cause immediate loss of steering control. To minimize risk: (1) never exceed the pressure limit, (2) use only certified tires, (3) verify bead seating before riding, (4) avoid high-speed cornering on rough surfaces, and (5) if you feel the tire squirm or hear any unusual sounds, stop immediately and inspect.

Q: Can I convert my hooked rims to hookless?

No, you cannot convert a hooked rim to hookless. The hook is an integral part of the rim structure - removing it (by grinding or cutting) would weaken the rim and create a dangerous, non-standard profile. If you want hookless rims, you need to buy wheels or rims that are designed and manufactured as hookless from the start. Do not attempt to modify hooked rims - it's unsafe and will void any warranty.

Q: Do all tubeless tires work on hookless rims?

No. Only tires that are explicitly certified for hookless rims (by the tire manufacturer) should be used on hookless rims. While many tubeless tires will physically fit on a hookless rim, they may not have the right bead stiffness, bead shape, or pressure rating to safely stay seated. Using a non-certified tire increases blow-off risk and may void your wheel warranty. Always check the tire manufacturer's website or packaging for hookless certification before using a tire on hookless rims. The list of hookless-certified gravel tires is growing (Panaracer, WTB, Maxxis, Specialized, Schwalbe, Pirelli, Continental, Vittoria all offer certified models), but it's still a subset of all available gravel tires.

Q: What's the maximum pressure for hookless gravel rims?

The maximum pressure depends on the rim manufacturer, rim internal width, and tire size. For gravel hookless rims (typically 25-30mm internal width), the maximum pressure is usually 40-55 PSI. Here's a general guideline: (1) 25mm internal rim with 35c tire: ~50 PSI max, (2) 25mm internal with 40c tire: ~45 PSI max, (3) 28mm internal with 40c tire: ~45 PSI max, (4) 28mm internal with 45c tire: ~40 PSI max, (5) 30mm internal with 50c tire: ~35 PSI max. Always check the rim manufacturer's specific recommendations - these are general guidelines, and the actual limit may be higher or lower depending on the rim design. And remember, these are MAXIMUM pressures - the optimal pressure for your weight and terrain will likely be lower (25-40 PSI for most gravel riding).

Q: Are hookless rims worth the extra cost and hassle?

It depends on your priorities. If you're a gravel racer or weight weenie who wants every possible advantage (40-80g weight savings, 1-3W aero savings, better impact resistance), and you're willing to deal with limited tire choices and pressure limits, hookless rims are worth it. If you're a casual gravel rider who values tire choice, flexibility, and simplicity (any tire, any pressure, tubes or tubeless), hooked rims are the better choice - they're more versatile and less hassle. For most gravel riders, hooked rims are the practical, reliable choice. Hookless rims are a niche product for riders who prioritize performance over convenience.

Q: Can I use hookless rims for bikepacking and touring?

Generally not recommended. Bikepacking and touring involve heavy loads (20-40kg of gear), which requires higher tire pressures to avoid bottoming out the tire. Hookless rims have pressure limits (40-55 PSI for gravel) that may not be sufficient for heavy loads, especially with narrower tires. Additionally, bikepacking often takes place in remote areas where a tire blow-off or mechanical could leave you stranded - the reliability and flexibility of hooked rims (with the option to use tubes) is more appropriate for remote touring. If you do want to use hookless for bikepacking, use wide tires (45c+) with low pressures, carry extensive repair gear, and stay within the pressure limits. For most bikepackers, hooked rims are the safer, more practical choice.

Conclusion: Hookless for Gravel - Promising, But Not for Everyone

Hookless rims offer real advantages for gravel riding: better impact resistance (no hook stress concentration), weight savings (40-80g per set), aerodynamic benefits (1-3W), and improved ride quality (more natural tire flex). These advantages make hookless rims appealing for gravel racers and riders who frequently encounter rough, rocky terrain.

However, hookless rims also come with significant trade-offs: limited tire choices (only hookless-certified tires), maximum pressure limits (40-55 PSI for gravel), no tube option, trickier installation, and the risk of tire blow-off if used incorrectly. These trade-offs make hookless rims less suitable for casual riders, heavy riders, bikepackers, rim brake users, and riders who want maximum tire flexibility.

The bottom line: If you're a gravel racer or performance-focused rider who wants every advantage and is willing to follow the rules (certified tires, pressure limits, proper installation), hookless rims are a great choice - they're lighter, more aero, and more impact-resistant than hooked rims. If you're a casual rider or value flexibility and simplicity, hooked rims are the better, more practical choice - they work with any tire, any pressure, and tubes or tubeless, with no blow-off risk.

Bola's current lineup uses hooked rims for maximum compatibility and reliability. We're actively researching hookless technology for future products. If you're interested in a custom hookless gravel build, contact our engineering team to discuss options.

Ready to Choose Your Gravel Wheels?

Explore Bola's complete gravel carbon wheel collection (all hooked-rim design for maximum tire compatibility and reliability):

• Gravel Wheels - 35mm and 45mm depths, 25mm internal width, optimized for 35-42c tires, any tubeless or clincher tire compatible
• Road Wheels - for road-to-gravel and all-road use (disc brake models work well with 32-35c gravel tires)
• Carbon Rims (DIY builds) - build your own custom gravel wheelset

All Bola wheelsets include: tubeless tape (pre-installed) + tubeless valves, 2-year warranty, crash replacement program (50% off), and free worldwide shipping on orders over $500. Have questions about hookless vs hooked rims, tire compatibility, or which gravel wheelset is right for you? Contact our engineering team at info@bolacarbon.com - we're happy to help you make the right choice.

Last updated: September 2027. Hookless rim information based on ETRTO TSS standard, manufacturer specifications (Zipp, ENVE, Cadex, etc.), and independent testing. Tire compatibility lists are partial and subject to change - always verify hookless certification with the tire manufacturer before use. Maximum pressure limits vary by rim model and tire size - always follow the rim manufacturer's specific recommendations.