Race Face centre assembly with double row bearings for frames with 121/124 mm frame width, 41 mm diameter and 30 mm diameter cranks. Double row bearings compensate for the smaller bearing diameter compared to the PF30 bearing and thus significantly extend bearing life. Bearing rings are fully coated for better corrosion resistance. Double sealing of the ball bearing ensures smooth operation for a long time. Brand new improved seals with double row bearings. Shell Standard Press Fit Bearing Style Double Row BB Diameter (MM) 41 Color Black Spindle Diameter (MM) 30 Weight 69g Weight Conditions BB92