Mavic

Cosmic SL 40 RB QR Wheel

What Our Gearhead® Experts Are Saying:

"I love the balance the Cosmic SL 40 brings. It has the snap and feel of a climbing wheel but holds speed like a deeper section rim. Braking is solid thanks to the iTgMax track, and the new hub makes it feel super responsive under power."

The Mavic Cosmic SL 40 Wheelset delivers a rare combination of climbing efficiency, aerodynamic speed, and smooth ride feel in a carbon package designed specifically for rim brake road bikes. Its 40mm NACA-inspired rim profile minimizes drag without adding weight, while the 19mm internal width supports modern road tire setups and boosts comfort and grip.

The UST Road tubeless system enhances rolling efficiency and flat resistance by eliminating the tube and allowing lower pressures without sacrificing performance. A redesigned rim bed makes tire installation easier than ever. Internally, the new Infinity hub platform reduces friction and improves lateral stiffness, giving the wheels a reactive, high-performance feel out of corners and over climbs.

The iTgMAX brake track is laser-treated and layered to offer the best braking performance Mavic has ever put on carbon. Each wheel includes carbon-specific brake pads, mounted rim tape, UST valve, and a multi-function tool for quick adjustment. Lightweight, durable, and responsive, the Cosmic SL 40 is a go-to upgrade for riders who want speed and control without compromise.