The SRAM dual drive system allows you to shift through all gears with just one hand
Allows for quick and easy shifting while standing still or under load
Perfect for touring or hilly terrain
Sram's dual drive is a unique drivetrain that combines a three-speed internal-gear hub with an external cassette and derailleur. The result is a wide-range of gears in a clean, one handed control system. The dual drive shifter features a grip shift motion for the rear derailleur and a thumb trigger that controls gear changes in the internal hub.