Galvanized sprocket (chainwheel), not offset, 37 teeth for freewheel hubs of various brands and models (Puch X30 NS/NL, X30 Velux, Sachs, Zündapp Belmondo etc.).

Dimensions:
Inner diameter: 94 mm
Pitch circle diameter: 105 mm
Mounting hole diameter: 6.4 mm

With different sprocket sizes, the gearing can be varied. Larger sprockets increase the RPM and improve acceleration, while smaller sprockets reduce the RPM at the rear wheel and increase the top speed. At the same time, there is always a loss of top speed for larger sprockets and a loss of acceleration for smaller sprockets as a result.