Some ISIS bottom brackets used small bearings which didn't last well.
I've no idea of the quality of the ISIS bracket in the Bosch motor.
Both square taper bottom brackets and derailer gears are cheap and durable which is why both are still in widespread use.
http://www.bikeradar.com/gear/category/components/bottom-brackets/product/review-superstar-components-isis-bb-10-35491/
I've no idea of the quality of the ISIS bracket in the Bosch motor.
Both square taper bottom brackets and derailer gears are cheap and durable which is why both are still in widespread use.
http://www.bikeradar.com/gear/category/components/bottom-brackets/product/review-superstar-components-isis-bb-10-35491/