BOLA 29er Carbon MTB Rim | 36mm Wide, 20/25mm Wave

1 total reviews

$320.00 USD

~~$360.00 USD~~ $320.00 USD

Sale Sold out

Free shipping | VAT included in EU & USA

Weave UD Matt UD Glossy Marble Matt Marble Glossy

Weight Standard Superlight Ultralight

A 29er carbon MTB rim with 36/30mm widths, wave profile (20/25mm heights), tubeless-ready, and four weight tiers 300–380g for XC and trail.

Trail-Ready Carbon Hoop

The BOLA 29er carbon MTB rim reshapes 2.2–2.6" tires for stronger cornering grip and reduced pinch-flat risk. Its wave profile (20mm or 25mm height options) balances low drag and lateral stiffness for XC, trail and light enduro.

Buying Guide.

Weight tier - Extreme Light ~300g: competitive XC, the thinnest impact margin.

Weight tier - Ultralight ~325g: XC race and fast trail.

Weight tier - Superlight ~350g: the trail balance.

Weight tier - Standard ~380g: all-mountain and light enduro durability.

Profile height - low wave for XC low drag; tall wave for trail stiffness and support under wide tires.

Internal width - 30mm: pairs with 2.0-2.6in tires at low pressure for cornering grip.

Same family - the Bola 32er asymmetric MTB rim is the larger-wheel cousin; choose this 29er unless your frame clears the bigger 32er.

Target Audience & Usage Notes.

XC racers, trail riders and light enduro enthusiasts.

Not for heavy downhill abuse or road racing.

The Ride That Awaits.

Point it into the singletrack and let the wave profile eat the bumps - wide MTB rubber at low pressure gripping roots and corners while the stiff rim answers every pump and bunny hop. You come out the other side with more speed and more confidence. Rated to a real rider weight and backed by a 3-year warranty with free shipping: build it and ride.

Specifications

Size: 29er

Material: Genius Toray carbon fiber

Rim Depth: 20/25mm

Bead Type: Hookless

Inner Width: 30mm

Outer Width: 36mm

ERD (Effective Rim Diameter): 589mm

Weight Tier: Standard 380g, Superlight 350g, Ultralight 325g, Extreme Light 300g

Trade-offs & Considerations

Aero vs Crosswind: The shallow 20/25mm wave profile is tuned for trail compliance rather than aerodynamics; at 40km/h it offers little aero gain but an almost negligible crosswind signature, and the wave shape helps absorb trail chatter without steering surge in gusts.

Weight vs Stiffness: The Extreme Light 300g layup saves about 80g versus the Standard 380g rim at the same 30mm internal width (±5g); lateral stiffness holds within 5% across tiers, so the lightest build keeps the same rim bed while the Standard tier adds durability for aggressive enduro.

Tire-Type Trade-off: The hookless bead runs tubeless 2.0-2.6 inch tyres at low pressure for grip and pinch-flat resistance; hookless needs tubeless-ready tyres and respects a pressure ceiling, trading the versatility of an open hooked rim for better sealing and lower pressures.

Sourcing & Delivery Trade-off: Stock drilling ships in 1-3 business days at $320; a chosen wave height (20mm or 25mm) or custom hole count adds 7-15 business days and a roughly $40-80 premium.

Performance Test Data

Fatigue Test: 750,000 cycles @640N (ISO 4210-7 Annex A, informative only)

Impact Resistance: >60J (Higher than ISO 4210-7)

Flatness: <0.25mm (internal QC)

Roundness: <0.3mm (internal QC)

Max Spoke Tension: >350 kgf (internal QC, spoke breaking tension)

Ultimate Strength: >100 kgf (internal QC, static spoke-hole point load)

Dynamic Equilibrium: <3g (internal QC)

Radial Stiffness: 90–110 N/mm (internal lab)

Lateral Stiffness: ≥8N/mm

Max System Weight: 110kgs

Recommended Use Cases

Gravel Racing: Excellent

Bikepacking: Good

Gran Fondo / Endurance: Suitable

Road Racing: Not recommended

Training / Daily Riding: Good

Not Recommended For: Road racing and heavy downhill abuse

Compatibility

Frame Compatibility: 29er mountain bike frames (ISO 622)

Tire Type: Tubeless-ready, for 2.2-2.6" MTB tires

Tire Width Range: 2.0–2.6 inches

Brake Standard: Disc brake only

Drivetrain: Compatible with standard MTB drivetrains

Rotor Standard: N/A

How It Compares

Model	Weight	Depth	Width	Price
29er 20/25mm Rim 36mm	Standard 380g, Superlight 350g, Ultralight 325g, Extreme Light 300g	20/25mm	30mm	See store
Model A	~455g	25mm	30mm	$389
Model B	~460g	25mm	30mm	$249
Model C	~440g	25mm	30mm	$289

FAQ

Do I get a bare rim here, or is it built up with a hub and spokes?

It's a bare carbon rim — no hub, spokes or nipples. Take it to any wheel builder to lace it to your own hub; we can also supply a built wheel on request.

What spoke drillings are available, and which brake type is this rim rated for?

Spoke drillings and brake rating depend on the build option, selectable at checkout. If you plan to lace your own wheel, confirm the drilling and brake type with Bola before ordering so the rim matches your hub and frame.

What spoke tension can I safely build to — will the holes pull out of the carbon?

Drive-side / disc-side maximum tension is 130–140 kgf, with the non-drive side adapted to match; the spoke holes are locally reinforced inside the carbon layup to prevent pull-out cracking.

Will the rim crack on rock gardens or bottom-outs at low pressure?

The bead area uses a thickened impact-reinforced layer; impact testing passes >60J extreme impacts (above the ISO 30J standard). Inner widths of 30mm accept wider tyres, which deform to absorb shock at low pressure.

Will I really pay no customs or VAT for delivery to the US and EU?

Yes. The Economy channel ships DDP — duties and VAT are fully prepaid by us, cleared in advance, and delivered to your door with no extra payment to customs or the courier.

Warranty & Shipping

Warranty Period: 3 years

Crash Replacement: 30% discount on replacement parts

Processing Time: In stock: 1–3 business days · Out of stock or custom order: 7–15 business days

Shipping method: FedEx/UPS/DPD/EMS Economy (free with duties & VAT included in USA & EU) · Expedited option available

Estimated Delivery: Economy 7–20 business days · Expedited 3–7 business days, customs clearance excluded

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