Bola SL 40R Carbon Disc Wheelset 700C — 40mm Deep T800 UD, DT Swiss 350s, 1320g

When your ride mixes fast paved stretches with hardpacked gravel, the Bola SL 40R wheelset balances aerodynamic efficiency with predictable crosswind handling so you can stay focused on pace and line choice. Built for endurance efforts and competitive training alike, these wheels accept 28–32c tires and are designed to feel confident at lower pressures for added traction and comfort on long days.

Bola SL 40R Carbon Disc Wheelset - Designed for Road and Gravel Performance

The 40mm rim depth and wide external profile deliver a stable aero feel without the hefty penalty of deeper rims, helping you maintain speed on flats and descend with composure in variable conditions. T800 UD matte carbon construction keeps the rim stiff yet light, while tubeless and clincher compatibility lets you optimize ride quality and rolling resistance for different routes and tire choices.

Riding comfort and control are part of the design: the wider rim supports 28–32c tires so you can run lower pressures for improved traction and reduced vibration, which matters on rough surfaces and long endurance efforts. The wheelset’s total weight of 1320g supports climbing and accelerations without sacrificing robustness for everyday training and race uses.

Why it fits your routine

• Balanced aero and stability: 40mm rim depth provides aerodynamic benefit on sustained efforts while avoiding extreme side-force sensitivity in crosswinds.
• Optimized width for modern tires: Internal widths of 21mm and 24mm with 28–30mm external rims accommodate 28–32c tires for comfort and grip at lower pressures.
• High-quality hubs: DT Swiss 350s hubs with a 36T ratchet ensure rapid engagement and dependable power transfer for racing and spirited riding.
• Lightweight construction: 1320g wheelset weight (excluding tape and valves) helps reduce rotational mass for improved climbing response and acceleration.
• Durable spokes: Sapim CX-Ray straight-pull spokes combine aerodynamic shaping and proven strength to minimize flex and support long-term ride consistency.
• Versatile axle standards: Center Lock disc interface and compatibility with 12x100/12x142mm thru-axle or quick-release setups suit modern road and gravel fork standards.
• Tubeless-ready and clincher compatible: Run tubeless for lower pressures and fewer flats or use standard clincher setups depending on your preference and tire selection.
• Professional compliance: Certified to ISO 4210-7 and REACH standards, meeting recognized durability and material-safety criteria for demanding use.
• Customization-ready: Two internal width options let wheel builders and riders tailor rim choice to specific tire profiles and handling priorities.

Detailed technical attributes include a T800 UD matte carbon fiber rim, 21/24mm internal rim widths with 28/30mm external measurement, Sapim CX-Ray 24/24 2-cross spoke pattern, and wheelset weight of 1320g as shipped without tape and valves. These elements combine to deliver a wheelset that performs across road and mixed-surface rides while providing the engagement, stiffness, and compatibility required for endurance racing and advanced training.