This bearing is for the original Bosch “Classic” and has a bespoke internal diameter.
Bosch Generation 1 “Classic”
This is one of the best sealed bearings we could find for this application.
Bosch generation 1 “Classic”
Bearing kit to replace all drive train bearings on the Bosch Gen 1 “Classic”
Bosch Generation 1 “Classic”
Bosch Gen 1 motor drive gear clutch bearing.
Bosch generation 1 “Classic”
This bearing is for the original Bosch “Classic” and has a bespoke internal diameter.
Bosch Generation 1 “Classic”
Bosch Gen 2 main motor bearing with fitting tool
This tool will ensure that your new main motor bearing will be fitted without damage. The main motor bearing fitted within the Bosch Gen 2 motor is a large bearing with extremely small ball bearings within it. These ball bearings can be very easily damaged when this bearing is fitted. The main motor bearing tool can be used to press the bearing into the motor cover and then support the bearing while the sprocket carrier/boss is pressed into the bearing.
Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Armature support bearing left hand side.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Armature support bearing right hand side.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Freewheel clutch bearing, fits into the large drive gear.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Gen 3 left hand crankshaft bearing fits in the left hand motor cover and supports the crankshaft.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Kit to replace all the bearings in the Bosch Gen 3 motor. This kit will fit the Active Line, Active Line Plus and Performance Line motor (There is no Gen 3 Performance Line CX)
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Gen 3 Right hand crankshaft bearing fits in the right hand motor cover and supports the sprocket carrier and crankshaft.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
This bearing supports the electric motor armature and fits into the left hand motor cover (non drive side).
Bosch Generation 4 BDU4xx
This kit contains the bearings, seals and circlips required to overhaul the Bosch Gen 4 crankshaft. We don’t usually say this, but we would not recommend you tackle this motor without a lot of specialist tools and a strong mechanical engineering background.
This kit will fit the Gen 4 Performance Line CX, Cargo and Speed motors.
Bosch Generation 4 motor BDU4xx.
Please see bearing identifier for bearing position.
Bearing will fit the Gen 4 Performance Line CX, Cargo and Speed motors.
Please see bearing identifier for bearing position.
Bearing will fit the Gen 4 Performance Line CX, Cargo and Speed motors.
Bosch Generation 4 motor BDU4xx.