Hettlage Drive

Hettlage Drive is a system of shifting of speed for the bicycles. It uses only one pedals and that only one pinion. The shifting of speed is carried out by increasing the diameter of the back pinion which is a polygon of 10 segments, whose points slide radially. This increase is carried out by 11 locating bearings. The chain can be either a belt notched out of plastic, or a normal chain.

External bonds

• Site of the manufacturer
• Article

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