A.5.2. Schlumpf - drives for mountain bikes
Schlumpf-drives are strong enough to be used on mountain bikes.
Indeed, there are two restrictions:
- Many mountain bike frames don't allow to mount a (big) chainring at the position of the middle chainring of a triple chainring set due to the geometry of the rear chainstay (see sketch on the right). Don't mount the chainring more outside, as this would cause a lot of derailment for the chain.
- Sealing of Schlumpf drives are optimized for lowest friction losses. Therefore, sealing is not designed to withstand high pressure cleaning with damp or water, as normally done on mountain bikes. This would cause corrosion inside of the drives.