The M-WAVE PD-R4-S Chainring is an ideal chainring for Bosch and Brose e-bikes (generations 1 and 3). This steel chainring has 42 teeth and is 104 mm in diameter.
• Made from steel.
• For Bosch e-bike engines (generation 1 and 3) and Brose e-bike engines.
• Has 42 teeth.
• 1/2" chain interior and 104 mm in diameter.