Skip to product information
1 of 5

700C Tubeless Carbon Rim 32mm outer 26mm Inner 45mm for Road | Bola

700C Tubeless Carbon Rim 32mm outer 26mm Inner 45mm for Road | Bola

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 road rim - a 32mm external / 26mm internal Toray carbon rim for balanced all-round aero road and light-gravel builds.

A middle path between the climber and the sprinter, the Bola 45mm road rim sits where aero and weight meet in honest agreement. Forty-five millimetres of Toray carbon, 32mm external and 26mm internal, sold rim-only for the rider who wants one wheel that does it all.

Buying Guide.

Weight tier - Extreme Light ~375g: the one-wheel-for-everything climber - light for rolling climbs, still aero on the flat.

Weight tier - Ultralight ~395g: the balanced middle - the sweet spot for most all-round racers.

Weight tier - Superlight ~420g: the sturdy build - impact margin for a season of mixed surfaces.

Weight tier - Standard ~450g: the durable daily choice for heavier riders and rough roads.

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

Same-depth series: the 45mm U-shape tubeless is the narrower disc-brake road version; the 45mm gravel rim is the wide gravel sibling.

Adjacent depth: the 40mm road/gravel rim climbs better; the 50mm road/gravel rim adds flat aero.

Target Audience & Usage Notes.

Target audience.: All-round road riders, gran fondo racers and light-gravel builders.

Rim-only.

Seat beads with a compressor; respect 90 psi and 110kg.

Not for flat TT maximum speed or aggressive gravel.

The Ride That Awaits.

Pair it with a quality hub, run a 32-38c tubeless, and roll out on a morning of promise: it climbs willingly, holds speed on the flat, and calms the gusts like a steady hand. One wheelset for everything - roads, gravel, and the days in between. Free shipping, a 3-year rim warranty and crash-replacement discount make it yours.

Specifications
Size: 700c
Material: Genius Toray carbon fiber
Rim Depth: 45mm
Bead Type: Hooked
Inner Width: 26mm
Outer Width: 32mm
ERD (Effective Rim Diameter): 548mm
Weight Tier: Extreme Light 375g / Ultralight 395g / Superlight 420g / Standard 450g (+/-10-15g)
Trade-offs & Considerations
Aero vs Crosswind: 45mm depth saves about 3.5W versus a 32mm rim at 40km/h; at 10° yaw the 32mm outer width keeps the front end predictable on exposed roads, at the cost of a more noticeable crosswind signature than a 35mm rim.
Weight vs Stiffness: The Extreme Light tier (375g) saves about 75g versus the Standard tier (450g) at the same 45mm depth (±5g); lateral stiffness holds within 3% across tiers, so the lightest build keeps the same rim structure.
Tire-Type Trade-off: The hooked bead accepts clincher and tubeless tyres from about 28c to 48c; the 26mm internal bed favours road-plus and light gravel volumes, and tubeless cuts rolling resistance but needs tape, valve and sealant to seal the bed.
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 26mm 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) road/gravel frames; brake type hub-dependent
Tire Type: Tubeless-ready clincher
Tire Width: 31-48mm (min 28mm)
Valve: 6.5mm Presta
Brake: Rim-only; disc or rim brake hub per build
How It Compares
FAQ
What tyre widths fit this rim?
With a 26mm internal width, run 28c–48c clincher or tubeless tyres; the sweet spot is 31–40c for road-plus and light gravel.
What is the ERD for spoke length calculations?
548mm. Use this Effective Rim Diameter when calculating spoke lengths for your build; 24/24 holes and a 6.5mm valve are standard.
Is the rim tubeless ready?
Yes. The hooked bead mounts tubeless tyres; use tubeless tape, a valve and sealant to seal the bed.
Which brake type is compatible?
Disc brake builds only — this rim has no rim-brake braking surface.
Which weight tiers are available?
Extreme Light (375g), Ultralight (395g), Superlight (420g) and Standard (450g) are selectable at checkout; Standard and Superlight suit riders over 100kg.
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