Bosch Chainring Spider (Boost) Gen 4 Performance CX
This spider mount sits between the Gen 4 CX Bosch drive unit and the outer 4 bolt chainring. Compatible with the Bosch Gen 4 Performance line CX. This is the offset 'Boost' version. If you need the 'Non-Boost' version click here.
Allows the motor to take a standard 104 BCD chainring. Chainring bolts not included.