Rear hubs feature 6/4 titanium cassette bodies with 3-pawl, 48-point (7.5 degree) engagement. CLD hubs are compatible with center lock style rotors. Uses Enduro ABEC 5 bearings and is easily serviceable/rebuildable. XDR models include spacers for XD compatibility . Manufactured from U.S. made 6061-T6 aluminum in Petaluma CA .