BOLA 27.5 Superlight Carbon MTB Rim | 36mm Wide, 30mm Internal

Q: How do I set up this rim tubeless?

The Bola 27.5" Superlight Carbon Rim is tubeless-ready with a hookless-compatible U-channel profile. Use tubeless valves and sealant, inflate to 45-65 psi for MTB tires. Ensure the tire bead seats properly; a compressor or high-volume pump may be needed for initial seating. The rim's 30mm inner width supports 2.25-2.6" MTB tires and 35-42mm cyclocross tires.

Q: What tire sizes are compatible?

The 30mm inner width supports MTB tires from 2.25" to 2.6" and cyclocross tires from 35mm to 42mm. This wide profile increases contact patch and stability. For best performance, choose tires that match your riding style; clamp on the wider end for more traction, narrower for speed.

Q: How much weight does this rim save compared to alloy rims?

At 370g (±10g), the Bola carbon rim saves approximately 150-200g per rim compared to typical alloy MTB rims of similar width. This lower rotational mass improves acceleration and climbing efficiency. Over a full wheelset, you could save up to 400g, enhancing overall bike handling.

Q: Can I build this rim with my own hubs and spokes?

Yes, this is a rim-only product, so you can build a custom wheelset with your choice of hubs and spokes. The rim has an ERD of 540mm and is designed for 27.5" (650b) wheel builds. It is disc-specific, so consider hubs with disc mounts. Ensure spoke tension does not exceed 300kg; the rim is tested to handle high tensions.

Q: How should I maintain and inspect this carbon rim?

Regularly inspect for cracks, delamination, or impact damage. Check spoke tension and true the wheel periodically. Clean with mild soap and water; avoid harsh chemicals. The rim is tested to ISO4210 and EN14766 standards, and comes with a 3-year warranty against manufacturing defects. Avoid excessive heat from brake pads; use disc brakes only.

$310.00 USD

~~$350.00 USD~~ $310.00 USD

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Weave UD Matt UD Glossy Marble Matt Marble Glossy

Spoke QTY 28/28 32/32 Customs

Weight Normal Super Light

The Bola 27.5" superlight carbon MTB rim — a 30mm internal, 30mm-high trail/cyclocross hoop at about 370g, tubeless-ready in Toray carbon.

When the trail narrows and grip must be bought in volume, a featherweight rim lets the bike float over the rough rather than grind through it. This 27.5" Bola rim answers with an ultra-low ~370g and a 30mm inner channel.

Buying Guide.

Weight tier - Ultralight ~370g: a single-tier race-and-trail build - the lightest 27.5" option, climbing and accelerating like a hoop a class up, so choose it for speed over outright impact margin.

Tire & terrain: the 30mm channel takes 2.25-2.6" MTB rubber and 35-48mm cyclocross tires at moderate tubeless pressure - a versatile middle ground for trail, mixed terrain and cyclocross.

Same-family: the 27.5" 34mm-inner rim (~390/440g, $310) runs wider for enduro support; choose this 30mm when speed and climbing win out.

Rider guidance ~110kg - build within that ceiling.

Target Audience & Usage Notes.

Trail, cyclocross and all-mountain riders who value responsiveness.

Rider guidance ~110kg; disc brake only.

Build rim-only with a disc hub and keep spoke tension under 300kg.

The Ride That Awaits.

Spin it up and you will feel the saving - this featherweight floats over the rough instead of grinding through it, making every climb a little kinder. Point it at berms and mixed terrain and the tubeless bed holds its line lap after long lap. A 3-year rim warranty and direct-from-factory shipping mean you build it and forget it.

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Material: Carbon UD
Rim depth: 30mm
External width: 36mm
Internal width: 30mm
Size: 27.5"
Profile: U-channel
Weight Tier: Superlight 370g
Max Tire Pressure: 65

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Weight vs Durability: At 370g, this rim is extremely light, but it still maintains compressive strength >300kg and lateral >50kg, ensuring durability on rough trails.
Tire Volume vs Speed: The 30mm inner width allows for wider tires (2.25-2.6") that increase traction and comfort, but may add rolling resistance compared to narrower rims.
Stiffness vs Compliance: With a radial stiffness of 90-110 N/mm, the rim is stiff for responsive power transfer, but some riders may find it less compliant than wider, heavier rims.
Versatility vs Specialization: This rim suits trail, cyclocross, and all-mountain riding, but it's not a dedicated XC aero rim or a downhill rim.

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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: ≥8 N/mm
Max System Weight: 110kgs

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Climbing / Hill Repeats: Excellent
Gran Fondo / Endurance: Good
Road Racing: Not recommended
Sprinting / Criterium: Not recommended
Training / Daily Riding: Suitable
Not Recommended For: Not recommended

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Frame Compatibility: 27.5" / 650b frames with disc brake mounts
Tire Type: Tubeless-ready, hookless compatible
Tire Width Range: 2.25"-2.6" MTB; 35-48mm cyclocross
Brake Standard: Disc only
Drivetrain: Any (depends on hub and freehub)
Rotor Standard: Disc (6-bolt or centerlock depending on hub)

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Superlight	N/A	N/A	N/A	370g	30mm	30mm	see store
M525	N/A	N/A	N/A	380g	30mm	30mm	~$500
3Zero Moto	N/A	N/A	N/A	390g	32mm	30mm	~$450
Control Carbon	N/A	N/A	N/A	380g	30mm	30mm	~$350

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How do I set up this rim tubeless?

The Bola 27.5" Superlight Carbon Rim is tubeless-ready with a hookless-compatible U-channel profile. Use tubeless valves and sealant, inflate to 45-65 psi for MTB tires. Ensure the tire bead seats properly; a compressor or high-volume pump may be needed for initial seating. The rim's 30mm inner width supports 2.25-2.6" MTB tires and 35-42mm cyclocross tires.

What tire sizes are compatible?

The 30mm inner width supports MTB tires from 2.25" to 2.6" and cyclocross tires from 35mm to 42mm. This wide profile increases contact patch and stability. For best performance, choose tires that match your riding style; clamp on the wider end for more traction, narrower for speed.

How much weight does this rim save compared to alloy rims?

At 370g (±10g), the Bola carbon rim saves approximately 150-200g per rim compared to typical alloy MTB rims of similar width. This lower rotational mass improves acceleration and climbing efficiency. Over a full wheelset, you could save up to 400g, enhancing overall bike handling.

Can I build this rim with my own hubs and spokes?

Yes, this is a rim-only product, so you can build a custom wheelset with your choice of hubs and spokes. The rim has an ERD of 540mm and is designed for 27.5" (650b) wheel builds. It is disc-specific, so consider hubs with disc mounts. Ensure spoke tension does not exceed 300kg; the rim is tested to handle high tensions.

How should I maintain and inspect this carbon rim?

Regularly inspect for cracks, delamination, or impact damage. Check spoke tension and true the wheel periodically. Clean with mild soap and water; avoid harsh chemicals. The rim is tested to ISO4210 and EN14766 standards, and comes with a 3-year warranty against manufacturing defects. Avoid excessive heat from brake pads; use disc brakes only.

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