More informationCurrently, Italian bottom bracket shells are only found on Italian bikes; They are 70 mm wide and have an internal diameter of 35 mm. This package has the parts to install your 24 / 22mm spindle crank in an ITA bb housing. They consist of bearings pressed into threaded cups, which are then threaded into the frame. Those bearings comprise either CeramicSpeed Standard or Coated Bearings. Super-round, super-smooth CeramicSpeed balls rotate in hardened steel races on both. The coated version has a metallic coating placed on the races, which makes it even softer and harder, resulting in a longer life and lower resistance