BOLA 29er Asymmetric Carbon MTB Rim | 36mm Wide, 30mm Internal
BOLA 29er Asymmetric Carbon MTB Rim | 36mm Wide, 30mm Internal
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The Bola 29er asymmetric carbon MTB rim — a 30mm internal, 30mm-high balanced-spoke hoop in Toray UD carbon (385-455g) for trail, enduro and freeride.
An asymmetric spoke bed evens the pull of drive and non-drive spokes, so the wheel stays truer longer. This 29er Bola rim pairs that balance with a 30mm inner channel for 2.3"-2.6" tires.
Buying Guide.
Weight tier - Superlight ~385g: the Light-grade acceleration build - about 70g of rotational saving over standard, for trail riders who climb as much as they descend.
Weight tier - Standard ~455g: the Midweight durability build - choose it for aggressive trail/enduro and heavier riders who want a truer, longer-lasting hoop.
Tire & terrain: the channel cradles 2.3-2.6" at moderate pressure - a versatile trail-to-enduro platform rather than a narrow XC racing rim.
Same-family: this asymmetric 30mm sits between the XC-focused 27mm rim and the wide 34mm enduro rim in the 29er line - step one way for speed, the other for grip.
Rated to a 110kg system weight.
Target Audience & Usage Notes.
Trail, enduro and freeride riders upgrading from alloy or worn carbon; shops and OEM builds.
Max system weight 110kg; disc only.
The Ride That Awaits.
Stand on your pedals and feel the offset bed pull straight - no wandering, no wriggle, just a wheel that holds its true season after season of abuse. Run lower tubeless pressure and it tracks rough corners like it is on rails, holding tension through the long descents. Lace it to a modern 29er hub and let the 3-year rim warranty do the worrying.
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- Material: Toray UD carbon
- Rim depth: 30mm
- External width: 36mm
- Internal width: 30mm
- Size: 29 in (622mm BSD)
- Profile: Asymmetric U-shape
- Weight Tier: Standard 455g, Superlight 385g
- Max Tire Pressure: 75
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- Weight vs Durability: The Standard version weighs 455g and offers enhanced durability, while the Superlight at 385g saves 70g but may be less durable. Choose based on priority: lighter for climbing, heavier for rugged trails.
- Tire Volume vs Speed: The 30mm internal width supports 2.3–2.6" tires, providing excellent traction and comfort. However, wider tires increase rolling resistance and weight, so narrower tires around 2.3" offer faster acceleration.
- Stiffness vs Compliance: The asymmetric U-shaped profile and carbon layup provide high lateral stiffness (>8N/mm) for precise handling, but this can reduce vertical compliance. The 30mm depth offers a balance, allowing some flex for comfort without sacrificing responsiveness.
- Price vs Performance: Factory-direct pricing delivers Toray carbon performance at a lower cost compared to major brands. While it may lack some advanced features, it offers comparable strength and stiffness for aggressive MTB use, making it a cost-effective choice.
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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: 110kgs
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- Trail Riding: Excellent – designed for aggressive trails with stable handling and wide tire support.
- Enduro: Excellent – asymmetric profile and 30mm internal width provide confidence on descents and stability at speed.
- Freeride: Good – durable construction suitable for freeride, but may be heavier than dedicated downhill rims.
- Climbing / Hill Repeats: Good – Superlight option at 385g reduces rotating weight, aiding climbs.
- Not Recommended For: Not recommended for road or cyclocross use, as it is optimized for MTB tires and braking.
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- Frame Compatibility: 29er mountain bike frames with disc brake mounts
- Tire Type: Tubeless-ready clincher
- Tire Width Range: 2.3-2.6 inches
- Brake Standard: Disc
- Drivetrain: Compatible with standard MTB drivetrains (Shimano, SRAM, etc.)
- Rotor Standard: Disc rotor compatible (6-bolt or centerlock, depending on hub)
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|---|---|---|---|---|---|---|---|
| 29er Asymmetric | N/A | N/A | N/A | 455g / 385g | 30mm | 30mm | see store |
| Carbon Rim 30mm | N/A | N/A | N/A | 450g | 30mm | 36mm | ~$250 |
| MTB Rim 30mm | N/A | N/A | N/A | 460g | 30mm | 36mm | ~$280 |
| Trail Rim 30mm | N/A | N/A | N/A | 440g | 30mm | 36mm | ~$300 |
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Is this rim tubeless-ready and how do I set it up?
Yes, the rim is tubeless-ready with a hookless design. To set up, install tubeless valves, use tubeless sealant, and inflate to seat the tire bead. The 30mm internal width ensures a secure fit for 2.3–2.6" tires. Recommended sealant amount is about 2-3 ounces per tire.
What tire sizes are compatible with this rim?
The rim supports tires from 2.3 to 2.6 inches in width, ideal for trail, enduro, and freeride. The 30mm internal width provides optimal tire profile and traction. Use tires designed for tubeless or with a tubeless-ready casing for best performance.
How much weight can I save compared to an aluminum rim?
The Standard version weighs 455g, while the Superlight is 385g. Typical aluminum MTB rims weigh around 500-600g, so you can save 100-200g per rim. This reduces rotating weight, improving acceleration and climbing efficiency.
Can I build a custom wheelset with these rims?
Yes, the rims are designed for custom builds. They use standard 32-hole spoke drilling (check) and are compatible with most hubs. The asymmetric profile ensures even spoke tension, making wheel building easier. We recommend using a spoke tension meter to achieve optimal tension.
What maintenance is required and what are common issues?
Regularly inspect the rim for cracks or delamination, especially after impacts. Check spoke tension periodically. Avoid heat damage by using appropriate brake pads for carbon rims (e.g., resin or organic). The rim has a 2-year warranty, but proper care extends its life.
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