This crank wedge is an essential replacement part for the safe and positive connection of the crank arm (pedal arm) with the crankshaft (or bottom bracket) on many common mopeds and older bicycles.

Key features:
- Diameter: 9.5 mm (equivalent to the standard size for many moped and bicycle bottom brackets).
- Function: Serves as a wedge that is driven into a corresponding recess (wedge groove) on the crank and shaft to ensure a form-fitting and secure connection.
- Material: Typically made of high-strength steel to withstand the high shear and bending forces during pedaling.
- Application: Indispensable for the mounting and repair of the bottom bracket, especially in older models that do not use a square or multi-tooth system.