Ebike Pas D17 Magnetic Disc for Pedal Sensor 12 Magnets Waterproof Plug
Installation: It is screwed to the chainring (4x). An adapter for a 5-arm pedal crank is included. Disassembly of the bottom bracket is not required. 1 X Pedal Assist Sensor. Compatibility: This magnetic disc is compatible with 22 teeth.