Light, fast and stiff with famous Mavic durability, the Mavic Cosmic Carbone 40 C Wheelset is the world's first reliable carbon clincher and the most versatile, aerodynamic wheelset ever. 40mm 3K carbon rim is Wind Tunnel optimized and features aluminum inserts at the tire seat and spoke bed, plus there's foam between these aluminum sections to enhance structural support without a weight penalty. Everything is bonded together using a proprietary treatment, rather than glue, for enhanced strength. TgMax treatment is also applied to the rim for increased braking power and minimized heat buildup between the carbon surface and the brake pad. It's able to resist the highest abuse by the most brutal racers in the worst conditions. Double butted, bladed steel spokes with integrated nipples enhance speed, are easy to service and laced to carbon/alloy hubs with aero flanges. Mavic's Yksion Pro GripLink front tire provides excellent cornering grip, low rolling resistance and long life while the Yksion Pro PowerLink rear tire delivers speed and responsiveness. Lightweight FTS-L freehub body gives instant power transfer and super smooth QRM+ cartridge bearings are fully adjustable. With exceptional heat dissipation, braking and lightweight aerodynamics, the Cosmic Carbone 40 C wheelset is hard to beat.