Engineered to perform over the long haul the ksyrium disc is a natural evolution of our popular ksyrium wheel designed specifically for disc brake use the rims feature patented ism inter spoke milling technology for the perfect balance of durability and lightweight the rims are laced to smooth rolling qrm bearing hubs with strong straight pull spokes mavic has also increased the spoke count from 20 to 24 for both the front and the rear wheel to handle the high torque levels that disc br