This is a durable double lip seal, specifically manufactured to fit the Bosch crankshaft. An effective waterproof barrier for the Bosch right-hand crankshaft bearing. If fitted with the Mudstop
bearing seal it makes a formidable barrier against water, mud or dust entering into the bearings of your expensive motor.
Fits Bosch Gen 2 Active Line, Performance Line and Performance Line CX motors
Only for Bosch Generation 2 motor BDU2xx (NOTE: Small chainring)