Ceramic BB30 Bottom Bracket RoadBB30 Ceramic Bottom Bracket Use "Product Finder" to find the compatible bottom bracket Cannondale introduced the BB30 standard in 2006. It is aiming to increase the pedalling efficiency by decreasing the distance between the pedals decreased Q factor. With a larger 30mm spindle diameter it improves the crank stiffness, in the meantime, reduces the twisting to conserve the energy more efficiently. BB30s bottom bracket bearings fit inside of the frame