34mm Wide Carbon Disc Road/Gravel Rim — 45mm & 50mm Aero Depth, Tubeless Ready
34mm Wide Carbon Disc Road/Gravel Rim — 45mm & 50mm Aero Depth, Tubeless Ready
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Engineered for riders demanding reliable speed, stiffness, and versatility, the Bola 34mm wide carbon disc brake rim is optimized for modern road and gravel bikes. Available in 45mm and 50mm aerodynamic profiles, each rim is crafted from high-modulus carbon fiber and designed for tubeless setup, supporting 28–32mm tires to deliver balanced aerodynamic efficiency and ride comfort—ideal for competitive road racing, gravel adventures, and long-distance endurance rides.
Key Features & Specs
- Rim Width: 34mm external, 25mm internal (optimized for 28–32mm tires)
- Profile Heights: 45mm or 50mm aerodynamic U-shape, wave profile
- Material: High-modulus Toray carbon fiber with UV-cure resin
- Weight (Normal/Superlight/Ultra-light): 480±15g / 430±10g / 380±10g per rim
- Brake Compatibility: Disc brake only
- Spoke Count: 24
- Supported Tire Type: Tubeless and tubeless-ready clinchers
- Max Rider Weight: 120kg
- ERD (Effective Rim Diameter): 539mm
- Tire Pressure Range: 100–125 psi
- Testing: Forward compressive strength >300kg; Lateral torsion resistance >50kg
- Warranty: 3 years (manufacturing defects)
How it Compares
| Feature | Bola 34mm Rim | Performance Competitor (E.g., Carbonal D23-50UL) |
|---|---|---|
| External Width | 34mm | 26mm–28mm |
| Internal Width | 25mm | 23mm–25mm |
| Rim Depth | 45/50mm | 50mm–55mm |
| Material | Toray high-modulus CF, UV-cure resin | T1000/T800 CF |
| Weight | 380–480g | 400–430g |
| Brake Compatibility | Disc only | Disc or rim (varies) |
| Max Tire Size | 32mm (optimal) | 28mm (typical) |
| Warranty | 3 years | 2 years (typical) |
Recommended Use Cases
- Road cyclists seeking an aerodynamic upgrade for disc brake bikes
- Endurance and Gran Fondo riders prioritizing comfort and stability
- Competitive racers needing lightweight, wide tubeless rims for improved speed and handling
- Gravel enthusiasts requiring extra tire volume for rough terrain and mixed surfaces
- B2B bike shops and wheel builders sourcing versatile, cost-effective carbon rims for custom builds
Frequently Asked Questions
What tire sizes are optimal for the Bola 34mm wide rim?
This rim is optimized for 28–32mm road and gravel tires, balancing aerodynamics and comfort. Wider tires (up to 32mm) maximize stability and grip on varied surfaces.
Which rim height—45mm or 50mm—offers better aerodynamic benefits?
The 50mm profile improves aerodynamic efficiency at higher speeds and on open roads. The 45mm option offers comparable performance with a slight advantage in crosswind stability and weight savings—choose based on your terrain and riding priorities.
Is lighter always better for carbon rims?
Lighter rims (down to 380g) offer faster acceleration and easier climbing, but extremely low weight may compromise impact resistance. Bola rims balance weight with strength and daily ride reliability, tested >300kg compressive strength to ensure safety in real-world use.
Are wide carbon rims suitable for everyday road cycling or just racing?
Wide carbon rims increase tire air volume, supporting lower tire pressures for improved comfort, grip, and tire safety in both daily rides and competitive scenarios. They are especially valued for longer rides, rougher pavement, and all-road versatility—not just racing.
What certifications or testing does this rim meet?
Each rim is tested in-house to >300kg forward compressive and >50kg lateral torsion resistance, with dynamic balance <3g, meeting rigorous quality control standards for reliability.
