More acceleration rapide amplifies riding pleasureSmaller spline diameter for a 10T sprocket by MICRO SPLINESimple installation and reliable performance on the trackEasy brake disc attachment with splined clamp and locking ringCENTER LOCKCenter distance: 148 mmCompatible with MICRO SPLINE 12-speed cassettes, the SHIMANO DEORE XT freewheel rear hub incorporates SCYLENCE technology to improve ride stiffness and deliver a quieter experience on the track.