Sometimes one speed is all you need. And Chris King's ISO Single-Speed rear hub is the top-tier choice for riders who want to experience the simplicity, fun, and sweet misery that one gear can provide. The large diameter hub shell uses Chris King's made-in-house stainless-steel bearings for unbeatable strength and durability, and the freehub offers near-instantaneous pedal engagement. Unlike most single-speed hubs which use a threaded freewheel, King's ISO hub uses a miniaturized version of their freehub body and easily replaced stainless steel cogs. This setup offers ease of maintenance, simple chainline adjustments, and serviceability. Six-bolt rotor compatibility keeps setup and parts choices simple so you can spend more time riding.