The disc brake road revolution has arrived. The EA90 SL Disc combines the stout 19.5-millimeter internal tubeless EA90 SL rim with Easton's M1 6-bolt disc hubs that have received an A+ Future-Proof rating by Velonews. Hubs easily converts from out of the box 9x100 and 10x135 quick release to 15x100 & 12x100 (front hub) and 12x135 & 12x142 (rear hub); parts sold separately.