The Rohloff 14-speed hub transmission is probably the finest piece of cycling engineering available. It's 540% gear range is enough to replace a standard 21 to 30-speed derailleur-based gearing system. It can be combined with additional front gearing to get even wider gearing.
Intended for use with frames that have a threaded eyelet for a 6mm torque support bolt (i.e. Surly Big Dummy, Troll, Ogre, etc.), or in tandem with the Rohloff Speedbone -
(More Details)
-Intended for use with frames that have a threaded eyelet for a 6mm torque support bolt (i.e. Surly Big Dummy, Troll, Ogre, etc.), or in tandem with the Rohloff Speedbone (HU3052) -For use with bolt on hub -
(More Details)