• Bola 700c 45mm Carbon Road Rim – 34mm Outer, 28mm Inner, Tubeless Ready
1 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

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

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: 35mm
Outer Width: 42mm
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: >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: >200 kgf (internal QC, static spoke-hole point load)
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
ModelWeightDepthWidthPrice
700C 45mm Rim 32mm Extreme Light 375g / Ultralight 395g / Superlight 420g / Standard 450g (+/-10-15g) 45mm 32mm See store
Model A ~430g 50mm 28mm $1,399
Model B ~430g 50mm 27mm $249
Model C ~420g 50mm 30mm $389
FAQ
Which tyres suit the 26mm internal width?
The 26mm internal width suits 30–38c tyres, bridging fast road riding and light gravel without going overly wide.
What spoke drillings are available, and which brake type is this rim rated for?
Spoke drillings and brake rating depend on the build option, selectable at checkout. If you plan to lace your own wheel, confirm the drilling and brake type with Bola before ordering so the rim matches your hub and frame.
What is the maximum spoke tension for 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 rim bead area uses a thickened impact-reinforced layer; impact testing passes >60J extreme impacts (above the ISO 30J standard). An inner width of 26mm accepts 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