What Our Gearhead(R) Experts Are Saying:"The Cosmic SL 32 Disc 21mm is an excellent climbing wheelset. The lightweight carbon rims accelerate quickly, and the Infinity hubs transfer power efficiently. The 21mm internal width pairs perfectly with modern road tires, delivering a smooth, responsive ride in any conditions."For riders who demand lightweight performance and responsive handling, the Cosmic SL 32 Disc 21mm is the ultimate upgrade. With a 32mm deep unidirectional carbon rim, this wheelset balances aerodynamic efficiency with low weight, making it an ideal choice for long climbs and fast-paced road riding. Mavic's Infinity hub platform ensures direct power transfer, while flat aero spokes improve stability and reduce drag. The 21mm internal width supports a wide range of tubeless road tires, enhancing comfort and grip on rough pavement. Paired with Center Lock(R) disc compatibility, these wheels offer precise braking control to match their impressive speed. Whether attacking climbs or sprinting on rolling terrain, the Cosmic SL 32 Disc 21mm delivers a ride that feels effortless and fast.