This middle composition is compatible with Shimano/Sram GXP cranks with 24mm axle diameter and BSA threaded frames.
The main advantages of Kogel ceramic bearings: - Guaranteed performance guarantee - Kogel ceramic bearings are more symmetrical (ie round) and manufactured to tighter tolerances than steel bearings - they are more efficient at transmitting power than standard bearings - Silicon nitride (the material used to make the bearing balls) does not corrode and resists wear for an extremely long time - BB Boost® technology - Placing the bearings as close as possible to the arms of the cranks to increase rigidity and durability
