Rapid Drive hub design instantly transfers effort into forward momentum. Tubeless Ready (TLR) rims allow for quick transition to tubeless system. Offset spoke bed reduces wheel dish for stiff and stable performance. Interchangeable axles allow for compatibility with more frames and forks. 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 Bontrager Tubeless Ready (TLR) rim tape and TLR valve stem.