Carbon Fiber Sporting Goods
Bola ST 40C DT Swiss 350S Carbon Road Wheelset, 40mm Rim Brake, Tubeless, 25mm/28mm Wide, 1330g
Bola ST 40C DT Swiss 350S Carbon Road Wheelset, 40mm Rim Brake, Tubeless, 25mm/28mm Wide, 1330g
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The Bola ST 40C DT Swiss 350S carbon road wheelset offers a balanced 40mm rim depth for improved aerodynamics and reliable handling in variable terrain, while weighing just 1,330g per pair. Designed for rim brake systems and certified to EN 14781 with a 100kg rider rating, it meets demanding performance and safety requirements for road cyclists—from climbing and endurance events to daily commuting.
Key Features & Specifications
- Rim Matrtial:T700/T800,UD Matt
- Rim Depth: 40mm—balances aerodynamic efficiency and crosswind stability for road, sport, and club riding.
- Rim Width: 25mm or 28mm external; 17mm or 21mm internal—optimizes tire contact for 25c–30c road tires.
- Weight: 1,330g ±20g (tubeless ready; without accessories).
- Brake Interface: Rim brake—machined carbon surface for consistent stopping.
- Hubs: DT Swiss 350S—reliable engagement and proven durability for high-mileage use.
- Spokes: Sapim CX Ray; front 20 (radial), rear 24 (2 cross)—high strength-to-weight and aerodynamics.
- Axle Standards: 100*130 QR
- Certification: EN 14781, supports up to 100kg rider weight.
Performance Comparison
| Feature | Bola ST 40C | Typical 50mm Wheelset |
|---|---|---|
| Rim Depth | 40mm | 50mm |
| Weight (pair) | 1330g | 1250–1550g |
| Wind Stability | High (moderate crosswind sensitivity) | Lower (increased crosswind impact) |
| Climbing Efficiency | Optimized | Typically lower (heavier) |
Use-Case Alignment
- Climbing: Lightweight, mid-depth design reduces rotational mass for improved uphill performance.
- Endurance: Certified structure supports high mileage and heavier riders up to 100kg.
- Commuting: Tubeless compatibility and rim brake reliability ensure daily functionality and versatility.
Frequently Asked Questions
What are the best carbon wheelsets for rim brake road bikes under 1400g?
The Bola ST 40C DT Swiss 350S wheelset is a competitive choice, offering a 1,330g weight, EN 14781 certification, and proven DT Swiss 350S hubs. Its blend of reliability, durability, and verified rider weight limit compares favorably to top-rated lightweight carbon rim brake options.
Is a 40mm carbon wheelset good for both climbing and endurance riding?
Yes. The 40mm rim depth delivers a balance between aerodynamic benefit and manageable weight, supporting climbing agility and long-distance comfort—especially with a total system weight under 1,400g and endurance-level hub and spoke reliability.
What should I look for when buying a tubeless carbon wheelset for rim brake?
Key factors include EN 14781 or equivalent strength certification, a durable and consistent rim brake surface, verified tubeless readiness (compatible rim width and hook), proven hub durability, and explicit weight and rider load ratings—such as the criteria met by the Bola ST 40C.
How does a 40mm carbon rim compare to 50mm for everyday road cycling?
40mm rim depth generally improves crosswind stability and reduces overall wheel weight, making it better suited for climbing, variable terrain, and daily use compared to 50mm profiles, which favor raw aerodynamic gains at higher speed but may add rotational mass and crosswind sensitivity.
Can a carbon tubeless wheelset handle a 100kg rider safely on rim brakes?
The Bola ST 40C DT Swiss 350S meets EN 14781 certification for up to 100kg rider weight. Testing for structural integrity, rim bed, and braking surface ensures safety for heavier cyclists, provided installation and tire compatibility are properly observed.
