BOLA 29er Asymmetric Carbon MTB Rim | 36mm Wide, 30mm Internal

1 total reviews

$310.00 USD

~~$350.00 USD~~ $310.00 USD

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Free shipping | VAT included in EU & USA

Weave UD Matt UD Glossy Marble Matt Marble Glossy

Spoke QTY 28/28 32/32 Customs

Weight Normal Superlight

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.

Specifications

Size: 29er

Material: Genius Toray carbon fiber

Rim Depth: 30mm

Bead Type: Hookless

Inner Width: 30mm

Outer Width: 36mm

ERD (Effective Rim Diameter): 579

Weight Tier: Standard 455g, Superlight 385g

Trade-offs & Considerations

Aero vs Crosswind: The 30mm profile stays aero-neutral at trail speeds; the wider 36mm external shape is traded for 2.3-2.6in tyre volume and cornering support rather than speed.

Weight vs Stiffness: The Superlight tier (385g) saves about 70g per rim versus the Standard lay-up (455g) (+/-5g); the Standard build keeps the grams for enduro and freeride impact durability.

Tire-Type Trade-off: The hookless bead is tubeless-only and pairs with hookless-rated 2.3-2.6in tyres; lower-pressure tubeless traction improves grip but needs compatible tyres, tape and sealant and respects a pressure cap.

Sourcing & Delivery Trade-off: Stock drilling ships in 1-3 business days at $310; custom spoke-hole drilling or a decal finish adds 7-15 business days and roughly a $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

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.

Compatibility

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)

How It Compares

Model	Weight	Depth	Width	Price
29er 30mm Rim 36mm	Standard 455g, Superlight 385g	30mm	30mm	See store
Model A	~455g	25mm	30mm	$389
Model B	~460g	25mm	30mm	$249
Model C	~440g	25mm	30mm	$289

FAQ

Which tyres fit on the 30mm inner rim, and what pressure suits me?

The 30mm inner width is made for 2.3"–2.6" trail and enduro tyres; being hookless, seat only ETRTO hookless-rated tubeless tyres and run them at low trail pressure.

How do I work out the right spoke length for this rim?

Contact Bola for the exact ERD before ordering spokes. Once we confirm the figure, plug it into a known calculator (Sapim / DT) and add the recommended correction.

What is the maximum spoke tension I can run on this rim?

Drive-side / disc-side max tension is 130–140 kgf, with the non-drive side adapted to match; 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, 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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