Carbon Fiber Sporting Goods
Bola EXT 40R 700C Carbon Disc Wheelset – 40mm, Hyper Carbon Spokes, 1170g, Ceramic Hub
Bola EXT 40R 700C Carbon Disc Wheelset – 40mm, Hyper Carbon Spokes, 1170g, Ceramic Hub
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The Bola EXT 40R 700C Carbon Disc Wheelset provides a 1170g lightweight solution optimized for road and gravel, combining a T800 UD carbon 40mm rim with 21mm or 24mm internal widths, Hyper carbon spokes, and TPI ceramic hubs for precision power transfer. Engineered for 28–32c tubeless tires and ISO 4210-7 certified, this wheelset meets the needs of professional and endurance cyclists seeking high performance, durability, and stability for racing and mixed terrain.
Explore the Bola EXT 40R Carbon Disc Wheelset for Enhanced Cycling
- Rim Depth: 40mm
- Internal Width: 21mm or 24mm
- External Width: 28mm or 30mm
- Material: T800 UD matte carbon fiber
- Spokes: 20/20 Hyper carbon
- Hub: Aluminum BL180 with TPI ceramic bearings and 54T ratchet
- Axle: Center Lock, 12x100mm (front) / 12x142mm (rear)
- Tire Options: Tubeless and clincher (optimized for 28–32c)
- Certifications: ISO 4210-7, REACH compliant
- Weight: 1170g (without rim tape or valves)
Performance & Use Case Comparison
| Feature | Bola EXT 40R | Common Alternatives |
|---|---|---|
| Rim Depth | 40mm | 35-45mm for mixed terrain |
| Internal Width | 21/24mm | 17-27mm; 24mm+ for larger tires |
| Spokes | Hyper carbon | Steel or bladed alloy |
| Hub Bearings | TPI ceramic, 54T ratchet | Stainless cartridge or generic ceramic |
| Weight | 1170g (w/o tape/valves) | 1200-1500g typical |
Use Case Alignment
- Ideal for road racing, gravel events, and endurance rides where low weight and aerodynamics are priorities.
- Accommodates 28–32c tubeless tires for stable performance on mixed and rough surfaces.
- Custom spoke and rim options support precise tuning for small/mid-size cycling brands and professional teams.
Frequently Asked Questions
Are 40mm carbon disc brake wheels suitable for both road and gravel cycling?
Yes. The Bola EXT 40R's 40mm rim depth and available 21mm or 24mm internal width support both road and gravel cycling. This construction balances aerodynamic efficiency with the ability to run wider tires (28–32c), making it versatile for mixed surface riding.
How do Hyper carbon-spoke wheels compare with traditional steel-spoke carbon wheelsets for weight and performance?
Bola's Hyper carbon spokes reduce rotational mass and improve aerodynamic performance compared to standard steel spokes. At 1170g, this wheelset is lighter than many steel-spoke alternatives, offering snappier acceleration while maintaining wheel stiffness and stability.
What are the benefits of TPI ceramic bearings in a bike wheel hub compared with other ceramic bearings?
TPI ceramic bearings are known for their consistent low-friction operation, durability, and tight engineering tolerances. Compared to generic ceramic bearings, TPI components offer better resistance to contamination and less frequent servicing for high-mileage riders.
Is a 21mm or 24mm internal rim width better for tubeless 28–32c tires?
For 28–32c tires, a 24mm internal width maximizes tire stability, cornering support, and reduced pinch flats when run tubeless. 21mm is better suited to riders prioritizing lower weight and narrower tire profiles for road use.
What is the difference among blade, foil, and Hyper carbon spokes on the carbon wheelset?
Blade and foil spokes refer to shape. Hyper carbon spokes are optimized for reducing the weight and air drag; blade and foil are similar, but 'Hyper' additionally considers wind resistance and turbulence, improving efficiency at higher speeds.
Precision Engineering with 40mm Carbon Rim Depth
The Bola EXT 40R carbon disc wheelset is built around a 40mm deep rim, expertly designed to balance aerodynamic efficiency and lightweight performance. This rim depth aids in cutting through wind resistance while maintaining excellent stability and control on varied terrains. Crafted from premium carbon fiber, the rim offers exceptional rigidity and durability without adding unnecessary weight. Its 700C size fits a wide range of road and racing bikes, making it a versatile upgrade for cyclists looking to improve speed and ride quality.
Innovative Hyper Carbon Spokes for Strength and Lightness
This wheelset features hyper carbon spokes that elevate both strength and weight reduction. The spokes are engineered to provide optimal tension and durability, ensuring the wheelset withstands rigorous cycling conditions. Their carbon construction reduces rotational mass, resulting in faster acceleration and smoother handling. By integrating hyper carbon spokes with the 40mm rims, the Bola EXT 40R carbon disc wheelset delivers a precision ride that enhances responsiveness and maximizes efficiency during long rides or competitive races.
High-Quality Ceramic Hub for Smooth Performance
A standout feature of the Bola EXT 40R wheelset is its ceramic bearing hub. The ceramic hub minimizes friction, ensuring a smoother and more efficient ride. This results in better power transfer and reduced fatigue, especially during intense cycling sessions. The hub's robust design also contributes to improved longevity and resistance to wear. Coupled with the lightweight rim and advanced spokes, the ceramic hub completes a high-performance wheelset that provides cyclists with reliability and speed over any distance.
