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FSA Patterson Metropolis internally geared cranksets
Gear up by 60% with this internally geared bottom-bracket / crankset / spider.

Schlumpf Mountain-Drive internally geared cranksets

Gear down by 2.5X with this innovative internally geared bottom-bracket / crankset / spider.

Schlumpf HighSpeed-Drive internally geared cranksets

Gear up by 2.5X with this innovative internally geared bottom-bracket / crankset / spider.

Schlumpf Speed-Drive internally geared cranksets

Gear up by 60% with this innovative internally geared bottom-bracket / crankset / spider.

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