Bola ST 40C Carbon Road Wheelset DT Swiss 350S — 40mm Rim Brake Tubeless 1330g

Lightweight and balanced, the Bola ST 40C wheelset is built for riders who split their miles between climbing, endurance rides, and everyday road use. Its 40mm rim depth and 1,330g per-pair weight deliver aerodynamic benefit without the heavy rotational mass of deeper rims, while tubeless readiness and a machined brake surface keep the wheels versatile for daily use on rim brake bikes.

Bola ST 40C — Designed for road climbing, endurance and daily riding

The mid-depth 40mm profile was chosen to combine aerodynamic gains with predictable handling in variable terrain, offering improved crosswind stability compared with deeper sections and better climbing responsiveness than many 50mm alternatives. With DT Swiss 350S hubs and Sapim CX-Ray spokes, the set targets reliable engagement and long-term serviceability for high-mileage riders.

Why it fits your routine

• Balanced aerodynamics and handling. The 40mm rim depth reduces drag while maintaining manageable crosswind sensitivity, making it suitable for club rides, mixed-terrain road routes, and fast climbing days.
• Lightweight construction. At approximately 1,330g per pair (±20g), the wheelset lowers rotational mass to help acceleration and uphill performance without sacrificing structure.
• Tubeless-ready versatility. Compatible rim widths (25mm or 28mm external) and tubeless-ready construction let you run wider tires for comfort and rolling efficiency on long rides and varied road surfaces.
• Optimized rim widths. External rim widths of 25mm or 28mm with 17mm or 21mm internal options support contemporary 25c–30c road tires for improved tire contact and ride quality.
• Reliable braking interface. Designed for rim brake systems with a machined carbon brake surface to provide consistent stopping performance when correctly bedded and maintained.
• Proven hub platform. DT Swiss 350S hubs deliver dependable engagement and serviceability favored by endurance and commuting cyclists.
• High strength-to-weight spokes. Sapim CX-Ray spoke selection (front 20 radial, rear 24 2-cross) balances aerodynamics and durability for sustained performance.
• Certification and load rating. EN 14781 certification and a rider rating up to 100kg provide an explicit structural standard for heavier riders and long-distance use.
• Standard axle compatibility. Built to 100x130 QR axle standards for straightforward fitment to compatible rim brake frames and forks.

Specifically constructed from T700/T800 carbon fiber with a UD matte finish, the Bola ST 40C wheelset combines modern carbon layups with component choices aimed at everyday reliability and competitive-weight performance for road cyclists seeking a middle-ground rim profile that suits climbing, endurance riding, and commuting needs.