The Rapid Drive hub design instantly transfers effort into forward momentum. Tubeless Ready (TLR) rims allow for quick transition to a tubeless system. The offset spoke bed reduces wheel dish for a stiff and stable performance. Interchangeable axles allow for compatibility with more frames and forks. A lightweight alloy rim (44mm outer, 39mm inner width) and 54-tooth Rapid Drive hubs. 6 bolt 100x15 front hub, 135/142x12 rear hub. SRAM XD available. Includes a Tubeless Ready (TLR) rim strip, TLR valve and interchangeable axle parts.