Dual Drive 27

Information from: http://www.sram.com/sram/trekking-comfort/products/dual-drive-27.

The hybrid drive for your bike Never miss a gear again! Dual Drive II is the innovative gear shifting system that makes shifting and cycling fun. Effortless one-handed gear-shifts for all gears! The thumb is used to simply select one of the three gear hub shifting levels: uphill, level or downhill – any time, even when stopped. The twist grip is used to operate the rear derailleur. You can shift any time, even when you’re pedalling hard. Never miss a gear again: maximum riding comfort - from beginner through to experienced tourer. There is also a trigger shifter for sport riders.

Specifications

Technology: 27-speed hybrid drivetrain: internal gear hub(3) - external drivetrain (9)

Transition: 578%

Gears: 27

Weight: Freewheel: 970g/Disc:985g