Schlumpf Innovations

High Speed Drive



The Schlumpf Innovations range of geared bottom brackets-- made in Switzerland to timepiece precision. Instead of running multiple chainrings up the front with much overlap in the gears, a planetary gear system is employed to provide a unique gearing between the the crank arms and the chainring. This means that with the Mountain Drive option, for example, your chainring spins at 1:1 in direct drive and your cranks rotate 2.5 times for every single revolution in low range. Using a 60-tooth up the front in direct drive, it drops down to the equivalent of a 24-tooth in low!

See Schlumpf for more info and instructions.


Mountain Drive - high 1:1, low 2.5:1
Speed Drive - high 1:1.65, low 1:1
High Speed Drive - high 1:2.5, low 1:1 

All drives, $847

Available as an upgrade on X-series and GTT trikes at time of purchase: 




Greenspeed Parts
Arkel Panniers
Front fenders
SRAM Dual Drive
Schlumpf geared BB
Other colors
Magura brakes
TA Specialites
FastBack Hydration Systems
HOZAN Cycle Tools
Fluid Trainers

Mountain Drive
Speed Drive
Ezy shift kick plates
Mountain Drive