Skip to product information
1 of 5

700C Tubeless Carbon Gravel Rim 42mm outer 35mm Inner 45mm

700C Tubeless Carbon Gravel Rim 42mm outer 35mm Inner 45mm

Regular price $340.00 USD
Regular price $400.00 USD Sale price $340.00 USD
Sale Sold out
Free shipping  |  VAT included in EU & USA
Weave
Spoke QTY
Weight
Set

The Bola 700C 45mm tubeless carbon gravel rim - a wide 42mm external / 35mm internal Toray carbon rim for 38-56mm gravel tyres and fast gravel builds.

Where the tarmac ends and the gravel begins, the Bola 45mm gravel rim answers with a 35mm inner bed and 45mm of aero. It is the gravel counterpart to the road 45mm - built for riders who want speed over rough ground with big-volume tyres.

Buying Guide.

Weight tier - Extreme Light ~410g: the rough-road racer's pick - lightest end for fast gravel out-and-backs.

Weight tier - Ultralight ~430g: the balanced middle - lively over ruts without the most fragile layup.

Weight tier - Superlight ~465g: the sturdy build - impact margin for loaded gravel days.

Weight tier - Standard ~490g: the durable choice - extra grams shrug off rough terrain and heavier riders.

Max rider weight: rated to 110kg - check rider + gear before ordering.

Same-depth series: the narrow road 45mm rim is the leaner road-leaning version; this wide bed is built for big gravel volume.

Adjacent depth: the 50mm gravel rim adds flat-course aero.

Target Audience & Usage Notes.

Target audience.: Gravel racers and rough-road riders building wide-volume wheelsets.

Rim-only.

On gravel, run ~70 psi or lower.

Respect 110kg.

Not for road-only speed or ultra-loaded touring.

The Ride That Awaits.

Lace it to a wide-flange gravel hub, mount a 40-50c tubeless, and float: the wide bed absorbs what the course throws at you, the 45mm depth carrying speed on the faster reaches, the rough-road racer inside you finally let loose. Chase the gravel, not the wheel. Free shipping, a 3-year rim warranty and crash-replacement discount.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 45mm
Bead Type: Hooked
Inner Width: 35mm
Outer Width: 42mm
ERD (Effective Rim Diameter): 548mm
Weight Tier: Extreme Light 410g / Ultralight 430g / Superlight 465g / Standard 490g (+/-10-15g)
Trade-offs & Considerations
Aero vs Crosswind: The 45mm depth offers some aero benefit on fast gravel and tarmac sections, but the 42mm outer width prioritises tyre volume over low drag; at 10° yaw the broad bed tracks steadily rather than being sharply gust-sensitive.
Weight vs Stiffness: The Extreme Light tier (410g) saves about 80g versus the Standard tier (490g) at the same 45mm depth (±5g); the 24/24 drilling adds spoke count and lateral durability for rough gravel.
Tire-Type Trade-off: The 35mm internal width is optimised for 38–56mm gravel tyres; running ~70 psi or lower on gravel yields grip and comfort, trading the high pressure headroom of a narrow road rim for big-volume compliance.
Sourcing & Delivery Trade-off: Stock drilling ships in 1–3 business days at $340; custom spoke-hole count or decals 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: 80–92 N/mm (internal lab)
Lateral Stiffness: 16–23 N/mm
Max System Weight: 110kg
Recommended Use Cases
Gravel Racing: Fastest-growing US/EU segment — NA holds ≈40% of the global gravel market (2026); Unbound-style endurance events reward wide 35mm beds with 35-50mm tubeless at 35-50 PSI.
Mixed-Surface Adventure: Eurobike 2026 trend toward all-road and 32er builds; this 45mm gravel platform transitions from tarmac to dirt without swapping wheels.
Bikepacking / Expedition: Eurobike/Cyclingworld Europe 2026 highlights bikepacking integration; wide beds carry 40-50mm tyres at low pressure for loaded comfort on rough routes.
Compatibility
Frame: 700C (ISO 622) gravel frames with wide clearance; brake type hub-dependent
Tire Type: Tubeless-ready clincher
Tire Width: 38-56mm gravel
Valve: 6.5mm Presta
Brake: Rim-only; disc or rim brake hub per build
How It Compares
FAQ
What is included?
A single bare carbon rim, sold rim-only with no hub, spokes, nipples or tape — for your own custom build or a single-rim replacement.
What gravel tyre sizes fit the 35mm inner width?
Optimised for 38–56mm gravel tyres on 700C.
What pressure should I run?
Around 70 psi or lower on gravel; do not chase high road pressures on rough ground.
How is it different from the road 45mm rim?
This gravel rim is 42mm outer / 35mm inner for big gravel volume; the road 45mm rim uses a narrower bed for road-plus tyres.
What is the ERD?
548mm, with 24/24 holes and a 6.5mm valve hole.
Warranty & Shipping
Warranty Period: 3 years
Crash Replacement: 30% discount on replacement parts
Processing Time: 1–3 business days (standard stock); 7–15 business days (custom)
Estimated Delivery: 7–15 business days (standard); 3–5 business days (expedited)
View full details