MID standard bottom bracket bearings. For 2014 we will offer Pro Series with top quality bearings and refined cones that reduce the amount of spacers needed for installation and reliable Intro Series for the entry level riders with affordable price. Two inner sleeves for 68mm and 73mm bottom bracket shells and a set of alu spacers included.
Pro series: Diameter: 19mm, 22mm. Weight: 168g / 5.93oz. (19mm); 154g / 5.43oz. (22mm).