The Shimano Deore XTR BB93B Bottom Bracket is used in mountain bikes that offer exceptionally high quality sealed bearings for ultimate smoothness, stiffness and light in weight. It is designed for use with Shimano 24mm Hollow MTB Cranks. With smoot rotation and better sealing performance, the Shimano XTR bottom bracket is durable for mountain bike usage. It is available in threaded and press-fit options.