Item Descriptions:
-Application: Used to secure the chainring or spider when the lockring is loose, preventing movement during pedaling.
-Compatibility: Compatible with Bosch Performance Line Speed BDU4XX, Cargo Line BDU4XX, and models 37YY, 31YY, 38YY.
-Material: Made from NBR (nitrile rubber), offering flexibility and reliable sealing performance under typical e-bike conditions.
-Dimensions: Measures 28 mm inner diameter with 1.8 mm thickness, designed for precise fit on the chainring assembly.
-Replacement Use: Designed to replace worn or missing O-rings to maintain chainring stability and proper drivetrain function.

Package:
2x orings

Item Specifications:
Dimensions:28 x 1.8
Colour:Black
Material:Rubber