speed drive
The speed drive is always the right solution, when wanting there to be no extreme marginal values (neither a very high gear nor a very low one) but however when a wider more general gear ratio is desired.
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high speed drive
The schlumpf high speed drive has a large gear transmission ratio and is suited to riding in very high gears (e.g. fast E bikes, bikes with small/thin wheels, recumbent sports bikes and velomobiles).
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mountain drive
With the schlumpf mountain drive you gain additional very low gears which enable you go climb the most extreme inclines easily.
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rehab drive
the schlumpf rehab drive reduces to very low gears helping you to master the most extreme ascents without a struggle. Built into rehab bicycles, handcycles, or trikes, this kind of gear is easily shiftable under load or while standing still.
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