SRAM i-MOTION 3 Hub (Disc Brake compatible)

Change gears any time: uphill, downhill, while pedaling or even sitting still with SRAM's i-MOTION Hub. You can explore new terrain with the 3-speed range and stop easily with powerful disc brake (sold separately). The internal shifting mechanism is protected inside the hub shell for excellent durability that's ready to go whenever you are. It's extremely low maintenance so all you have to do is enjoy the ride!