RaceFace's X-Type external bottom bracket has been totally redesigned and upgraded for 2010. Bearings, sealing and machining precision are all improved to create a smoother running, longer lasting BB set which is now fully serviceable.
Filled with Phil Wood waterproof grease and are compatible with Shimano Hollowtech II cranksets
Premium grade-5 chromium steel ball bearings
Dual-surface (radial and axial) face-wiper seals (snap ring retained)
Designed to be used with cranksets that have either X-Type or EXI spindles