• Bola 700c 45mm Carbon Road Rim – 34mm Outer, 28mm Inner, Tubeless Ready
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700C 35mm Tubeless Carbon Gravel Rim 36/30mm | Bola

700C 35mm Tubeless Carbon Gravel Rim 36/30mm | Bola

$320.00 USD
$360.00 USD $320.00 USD
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Free shipping  |  VAT included in EU & USA
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A 35mm hooked or hookless(UV) carbon gravel rim with 36/30mm widths, tubeless-ready, and four weight tiers from 350–435g for gravel racing and endurance.

Balanced Aero Gravel Platform

The BOLA 35mm gravel rim sits at the crossover between aero benefit and crosswind control. Its 30mm inner width optimally supports 35–48mm tires at lower pressures for traction on loose or uneven surfaces. UV profile follows ETRTO guidance.

Buying Guide.

Weight tier - Extreme Light ~350g: weight-optimized race builds.

Weight tier - Ultralight ~370g: race-day gravel.

Weight tier - Superlight ~390g: all-day endurance gravel.

Weight tier - Normal ~435g: training and value, the most forgiving.

Internal width - 30mm hookless: pairs with 35-48mm ETRTO-approved tubeless tires at low pressure; use hookless-rated rubber only.

Adjacent depth - this mid section balances aero and crosswind; shallower Bola gravel rims are calmer on rough ground.

Target Audience & Usage Notes.

Gravel racers, bikepackers, gran fondo riders on mixed surfaces.

Not for heavy downhill or extreme abuse.

The Ride That Awaits.

Let the dust rise and the loose stones skitter - the hooked/hookless bed cradles 35-48mm rubber at low pressure, grip blooming where narrower tires wash out. It is the calm centre of a chaotic race. With ETRTO-approved tubeless tires mounted, free shipping and a 3-year warranty carry you home.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 35mm
Bead Type: Hooked
Inner Width: 30mm
Outer Width: 36mm
ERD (Effective Rim Diameter): TBD
Weight Tier: Normal 435g, Superlight 390g, Ultralight 370g, Extreme Light 350g
Trade-offs & Considerations
Aero vs Crosswind: The 35mm depth saves about 2.5W versus a 28mm rim at 40km/h; at gravel speeds and 10° yaw the wide 36mm outer profile stays stable on loose surfaces, and the shallow depth keeps crosswind disturbance low on exposed gravel roads.
Weight vs Stiffness: The Extreme Light tier (350g) saves about 85g versus the Normal tier (435g) at the same 35mm depth (±5g); lateral stiffness holds within 3% across tiers, so the lightest build keeps the same gravel-rated structure.
Tire-Type Trade-off: The 30mm inner width is optimised for 38c to 50c gravel tyres at low pressure; tubeless needs tape, valve and sealant but lets you run about 28–38 PSI for traction, while clinchers with a tube cap higher pressure but add rolling resistance.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days; custom spoke-hole count, nipple angles or decals add 7–15 business days, and the factory-direct price is listed in the store configurator.
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: 105kgs
Recommended Use Cases
Gravel Racing: Excellent.
Bikepacking: Good.
Gran Fondo / Endurance: Excellent.
Road Racing: Suitable.
Training / Daily Riding: Good.
Not Recommended For: Not recommended for heavy downhill or extreme abuse; consider a more robust rim for downhill.
Compatibility
Frame Compatibility: 700c gravel or road frames with disc brakes
Tire Type: Tubeless (hookless compatible)
Tire Width Range: 35-48mm
Brake Standard: Disc
Drivetrain: Any standard drivetrain (compatible with Shimano, SRAM, Campagnolo)
Rotor Standard: Not applicable (rim only)
How It Compares
ModelWeightDepthWidthPrice
700C 35mm Rim 36mm Normal 435g, Superlight 390g, Ultralight 370g, Extreme Light 350g 35mm 36mm See store
Model A ~430g 50mm 28mm $1,399
Model B ~430g 50mm 27mm $249
Model C ~420g 50mm 30mm $389
FAQ
Which tyres fit on the 30mm inner rim, and what pressure suits me?
The 30mm inner width is optimised for 38mm–50mm gravel tyres; riders under 80 kg run roughly 28–38 PSI, and the hooked bed takes clincher and tubeless both directly.
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 >40J 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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