Schlumpf Super High Speed Drive

We are a Schlumpf service center and stock most parts for them.

Schlumpf drives need lubrication injected once or twice a year and a complete overhaul every 3000 miles.

Schlumpf drives are a fantastic way to increase the gear ratios of an internally geared hub. They do not affect the input ratio and can give you very low gears for steep hills without causing excess stress on your hub. Even though this is contrary to text book physics and gear ratios, the reality of it does not seem to affect hub durability or function! Very low gears do feel mush due to the extra gear lash and wind-up, but they work just fine. The pedals may feel somehwhat mushy or bouncy.