Bola ST 40C Carbon Road Wheelset DT Swiss 350S 40mm Rim Brake Tubeless 25mm or 28mm Wide 1330g
Bola ST 40C Carbon Road Wheelset DT Swiss 350S 40mm Rim Brake Tubeless 25mm or 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.
The Bola ST 40C DT Swiss 350S Carbon Road Wheelset is a tubeless-ready carbon wheelset for rim brake road cyclists who want a lightweight 40mm option for climbing, endurance rides, and everyday road use. At 1,330g per pair, it combines a mid-depth profile with DT Swiss 350S hubs and an EN 14781 rider rating up to 100kg.
Key Features & Specs
- Rim construction: T700/T800 carbon fiber with a UD matte finish.
- Rim depth: 40mm.
- Rim width options: 25mm or 28mm external width, with 17mm or 21mm internal width.
- Wheelset weight: 1,330g ±20g per pair, tubeless ready and without accessories.
- Brake interface: Rim brake with a machined carbon braking surface.
- Hubs: DT Swiss 350S hubs.
- Spokes: Sapim CX-Ray, 20 radial front spokes and 24 two-cross rear spokes.
- Axle standard: 100 x 130 QR.
- Certification and rider rating: EN 14781 certified, rated for riders up to 100kg.
How it Compares
| Feature | This Product | Why It Matters |
|---|---|---|
| Rim Depth | 40mm | Balances aerodynamic efficiency and crosswind stability for a range of road conditions. |
| Weight | 1,330g ±20g per pair | Low weight supports climbing performance and reduces rotational mass for agility. |
| Certification | EN 14781, 100kg rider rating | Verified structural integrity and safety for riders up to 100kg ensure confidence and reliability. |
| Compatibility | Rim brake, tubeless ready, 25mm/28mm external width | Supports multiple tire sizes and braking systems for broader user needs. |
| Hubs and Spokes | DT Swiss 350S hubs, Sapim CX Ray spokes | Trusted components contribute to long-term durability and consistent performance. |
Frequently Asked Questions
What are the best lightweight carbon road wheelsets for climbing and all-around performance?
The Bola ST 40C DT Swiss 350S is designed for climbing and all-around road riding, combining a 1,330g ±20g pair weight with a 40mm rim depth. Its mid-depth profile balances aerodynamic efficiency with manageable weight for climbing, sport, and club riding.
Can you recommend tubeless road bike wheels for riders who want reliable handling in varied terrain?
The Bola ST 40C DT Swiss 350S is a tubeless-ready road wheelset with a 40mm rim profile intended for reliable handling in variable terrain. It is offered with 25mm or 28mm external rim widths and 17mm or 21mm internal widths for 25c to 30c road tires.
Is this a good road wheelset for endurance events and riders up to 100kg?
Yes, the Bola ST 40C DT Swiss 350S is certified to EN 14781 and carries a 100kg rider weight rating. DT Swiss 350S hubs and Sapim CX Ray spokes support its intended high-mileage endurance use.
Which carbon rim brake wheelsets suit cyclists who want aerodynamics and daily riding practicality?
The Bola ST 40C DT Swiss 350S pairs a 40mm aerodynamic carbon rim with a machined carbon rim-brake surface for consistent stopping. Its 40mm depth is positioned for road, sport, club riding, commuting, and variable terrain rather than the greater crosswind sensitivity associated with a typical 50mm profile.
Recommended Use Cases
- Climbing-focused road rides where low wheelset weight and a 40mm profile suit sustained ascents.
- Endurance events and long-distance training for riders within the 100kg rider rating.
- Road riding in variable terrain and changing wind conditions where a mid-depth rim is appropriate.
- Daily commuting on rim brake road bikes with 100 x 130 QR axle fitment.
- Road bike builds using tubeless-ready tires within the stated 25c to 30c tire range.
