• 29er Hookless Carbon MTB Rim illustration showing a 23mm profile, 28mm inner width, and dimensions for tubeless setup.
  • 29er Hookless Carbon MTB Rim with a 23mm profile and 28mm inner width, showcasing a tubeless-ready design.
  • 29er Asymmetric Carbon MTB Rim | 30mm Height, 30mm Inner Width | Freeride & Enduro Bola
  • 29er Asymmetric Carbon MTB Rim | 30mm Height, 30mm Inner Width | Freeride & Enduro Bola
1 5

29er Carbon MTB Rim 28mm — Hookless Tubeless-Ready | Bola

29er Carbon MTB Rim 28mm — Hookless Tubeless-Ready | Bola

$310.00 USD
$350.00 USD $310.00 USD
Sale Sold out
Free shipping  |  VAT included in EU & USA
Weave
Spoke QTY
Weight

The Bola MTB34-C23-29 29er hookless carbon rim — a 28mm internal, 23mm-low-profile hoop (300-375g) built for XC and light trail.

Built for the clock, ready for the singletrack: model MTB34-C23-29 pairs a low 23mm profile with a 28mm inner channel for a rounder tire shape and snappy acceleration. Three layups let you dial the grams for XC race day.

Buying Guide.

Weight tier - Ultralight ~300g: the competitive-XC build - lightest layup for race-day climbs, with the thinnest impact margin.

Weight tier - Superlight ~330g: the race-and-training balance - extra grams for daily abuse without giving up XC speed.

Weight tier - Standard ~375g: the Light-grade longevity build - choose it for endurance and rough training where durability wins.

Tire & terrain: the narrow channel optimizes 2.1-2.4" ETRTO hookless rubber - build it for XC and light trail; wider 2.4"+ adds grip but costs speed.

Same-family: this is the narrowest, lowest-profile 29er XC/light-trail hoop; the 27mm asymmetric and 30mm rims step up to more trail capability.

Hookless demands ETRTO-compliant tubeless tires; rated to a 110kg system weight.

Target Audience & Usage Notes.

XC racing, light trail and endurance.

Not for enduro/DH or riders over ~100kg.

Max system weight 110kg in the spec table.

Disc only.

The Ride That Awaits.

Point it at the XC start and feel it wake up - a narrow, low hoop that spins fast and rolls over singletrack like it has been waiting all winter. ETRTO tubeless only, so it beds clean and runs supple at race pressure. Choose a layup and build it; the 3-year rim warranty means you focus on the line, not the rim.

Specifications
Size: 29er
Material: Genius Toray carbon fiber
Rim Depth: 23mm
Bead Type: Hookless
Inner Width: 28mm
Outer Width: 34mm
ERD (Effective Rim Diameter): 592mm
Weight Tier: Standard (375g), Superlight (330g), Ultralight (300g)
Trade-offs & Considerations
Aero vs Crosswind: The shallow 23mm depth gains essentially nothing aerodynamically versus a 20mm profile at trail speeds, so there is no crosswind penalty; the trade-off is a wide 28mm internal bed that needs hookless-approved tires.
Weight vs Stiffness: The Ultralight tier (300g) saves about 75g versus the Standard tier (375g) (±5g); lateral stiffness holds within 3% across tiers, but the lightest layup has less impact margin for rocky enduro riding.
Tire-Type Trade-off: The hookless bead is tubeless-only and fits ETRTO hookless-approved tires from about 2.1 to 2.4 inches; it seals cleanly with tape and sealant but cannot be run with a hooked clincher or inner tubes.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $310; custom spoke-hole count, valve hole or nipple angles add 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: >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
Recommended Use Cases
Cross-Country Racing: Excellent. Ultralight and Superlight options reduce rotational weight for climbing and acceleration.
Light Trail Riding: Suitable. Standard weight option adds durability for varied trails, but the rim is not designed for aggressive downhill.
Endurance Rides: Good. Low profile and tubeless setup reduce fatigue over long distances.
Training / Daily Riding: Suitable. The 28mm inner width provides stable tire support for daily training, but the hookless design limits tire pressure to 65 psi.
Not Recommended For: Not recommended for enduro or downhill riding, or for riders exceeding 100kg, as the rim's impact tolerance is optimized for XC conditions.
Compatibility
Frame Compatibility: 29er (ISO 622mm) mountain bike frames
Tire Type: Tubeless ready, hookless, ETRTO-compliant tubeless tires
Tire Width Range: 2.1-2.4" (53-61mm)
Brake Standard: Disc brake only
Drivetrain: Hub-dependent (rim does not affect drivetrain)
Rotor Standard: Hub-dependent
How It Compares
ModelWeightDepthWidthPrice
29er 23mm Rim 34mm Standard (375g), Superlight (330g), Ultralight (300g) 23mm 34mm 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 28mm inner rim, and what pressure suits me?
The 28mm inner width pairs with 2.1"–2.4" XC/trail tyres; as it is hookless, run only ETRTO hookless-rated tubeless tyres, starting around 30–35 PSI and staying within the bead's safe cap.
How do I work out the right spoke length for this rim?
The ERD is 592mm, measured on our standard basis. Use a known calculator (Sapim / DT) and add the manufacturer-recommended correction for this rim.
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 >40J extreme impacts (above the ISO 30J standard). Inner widths of 28mm 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
View full details