FAQ details

Smallest permittable sprocket ratios

The sprocket ratio on the Rohloff SPEEDHUB 500/14 (e.g. 42/16) converts the slow rotational speed at the crank into a fast rotational speed at the sprocket and thus reduces the input torque for the Rohloff SPEEDHUB 500/14 simultaneously.

To prevent overstraining the hub, a minimum sprocket ratio of 2.1 must be used. With the available sprockets these minumum possible sprocket ratios are:
36/17, 34/16, 32/15 and 28/13.

This resembles a derailleur transmission of 20/34. Larger chainrings can be used without exceptions.

Attention!

If mounting the SPEEDHUB 500/14 on a tandem or if the rider weighs over 100kg, the following sprocket ratios are the lowest permitted for use:
34/13, 38/15, 40/16, 42/17.

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