Mavic Cosmic SL 40 Rim Brake Tubular Wheelset

Introducing the Mavic Cosmic SL 40 Rim Brake Tubular Wheelset, engineered for discerning cyclists riding rim-brake road frames who demand aerodynamic speed, lightweight build, and dependable stopping power.

These 700c wheels feature 100% carbon fiber, 40 mm deep NACA-profile rims with Mavic’s advanced iTgMax laser-treated brake surfaces designed for optimized performance in both dry and wet conditions. Built around lightweight Infinity hubs with Instant Drive 360 freehub engagement and QRM Auto-bearing preload, the wheelset supports efficient acceleration and long-term durability.

Specs at a Glance

• Material: Carbon fiber rims
• Rim Dimensions: 40 mm depth, 19 mm internal width (approx. 26 mm external)
• Compatibility: Clincher/tubular hook—aero rims suitable for 28 mm tires
• Brake System: Rim-brake only, supported by iTgMax treatment
• Spoke Configuration: 18 front / 24 rear, straight-pull bladed steel spokes
• Hubs & Bearings: Aluminum Infinity hubs; Instant Drive 360 freehub; QRM Auto bearings
• Axle Type: Quick Release (QR)
• Weight: ~1,600 g (pair); Front ~705 g, Rear ~895 g
• Max Rider Weight: Approx. 120 kg (264 lb) including bike

Design Benefits

1. Aerodynamic Advantage: The 40 mm NACA rim profile balances wind slicing capability with crosswind stability. :contentReference[oaicite:2]{index=2}
2. Superior Rim-Braking: iTgMax-treated surfaces enhance braking modulation and heat resistance in varied conditions. :contentReference[oaicite:3]{index=3}
3. Efficient Power Delivery: Instant Drive 360 hubs offer crisp freehub engagement and overall snappiness. :contentReference[oaicite:4]{index=4}
4. Optimal Weight-to-Performance: At ~1,600 g, this wheelset remains light while maintaining structural integrity and aerodynamic capability. :contentReference[oaicite:5]{index=5}
5. Versatile Tire Support: Designed for 25–32 mm tires, ensuring wide compatibility for rim-brake frames. :contentReference[oaicite:6]{index=6}

Final Take

The Mavic Cosmic SL 40 Rim Brake Tubular Wheelset offers rim-brake riders a rare blend of lightweight performance, refined aerodynamics, and enhanced braking confidence. A committed choice for those who prefer rim brakes without sacrificing modern speed, control, or comfort.