Carbon Fiber Sporting Goods
Bola 700c 45mm Carbon Road Rim – 34mm Outer, 28mm Inner, Tubeless Ready
Bola 700c 45mm Carbon Road Rim – 34mm Outer, 28mm Inner, Tubeless Ready
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The Bola 700c 45mm Carbon Road Rim is engineered for road and gravel riders demanding balanced aerodynamics, weight, and tire versatility. A 34mm outer and 28mm inner width supports 25–32mm tubeless tire systems, providing stability on paved and mixed-surface conditions. Verified weights (370–445g) are available across three build grades, with absolute tolerances for flatness (<0.15mm) and roundness, ensuring consistent wheel assembly for OEMs and teams. Fully compatible with disc-brake builds and custom spoke drilling.
Key Specifications
- Rim Diameter: 700c (ISO 622mm BSD)
- Profile Height: 45mm
- Outer Width: 34mm
- Inner Width: 28mm
- Effective Rim Diameter (ERD): 548mm
- Rim Shape: Hooked U-profile, tubeless ready
- Valve Hole: 6.5mm (customizable)
- Spoke Hole: 4.5mm (customizable)
- Material: High-modulus carbon fiber, UV-cure resin
- Weight: 370–445g verified by build grade
- Compliance: Forward compression >300kg, lateral torsion >50kg, spoke tension >280kg
- Warranty: 3 years from purchase
Performance & Use
- Optimized for 25–32mm road and gravel tires, allowing riders improved comfort and efficiency across endurance, racing, and urban segments.
- 28mm internal width accommodates modern tire casings for stability at lower pressures with tubeless setup.
- Disc-brake ready; ideal for competition, training, and performance-oriented OEM partnerships.
- Tight manufacturing tolerances (<0.15mm flatness) facilitate trouble-free building and longevity.
- Dynamic balance <3g ensures smooth high-speed rotation, verified against industry norms.
Comparison Table
| Attribute | Bola 45mm | Typical 45mm Carbon | 700c Aluminum Rim |
|---|---|---|---|
| Profile Height | 45mm | 45mm | 30mm |
| Outer Width | 34mm | 30–32mm | 20–25mm |
| Inner Width | 28mm | 22–25mm | 17–19mm |
| Weight | 370–445g | 390–470g | 530–600g |
| Disc Brake Ready | Yes | Varies | Varies |
Frequently Asked Questions
Is a 45mm deep, 28mm inner width carbon rim good for both road and gravel riding?
Yes, the 45mm depth balances aerodynamic efficiency on pavement with crosswind stability, while the 28mm inner width safely supports both road (25–32mm) and gravel tires, ensuring versatility for mixed-terrain use.
How does a 700c 45mm carbon rim compare to an aluminum rim for endurance cycling?
Compared to aluminum, the Bola carbon rim offers a lighter (370–445g vs. 530–600g) and stiffer platform. While carbon costs more, it reduces fatigue by decreasing rotational mass and increases speed with its aerodynamic profile.
What tire sizes work best with a 34mm wide, tubeless ready carbon road rim?
25–32mm tires (road/gravel) are optimal. The wide internal channel improves tire stability and air volume, favoring performance at lower pressures, especially in tubeless configurations.
Are lightweight 45mm carbon rims strong enough for racing and daily training?
Yes, each Bola rim undergoes impact and spoke hole tension testing (certified >300kg and >280kg), exceeding typical UCI durability standards for both race and training applications.
What's the benefit of choosing a wider 28mm inner width rim for my road bike?
The 28mm inner width allows a tire to maintain its shape and volume for better grip, reduced rolling resistance, and improved comfort—especially useful for wider modern tires and gravel setups.
