Shimano bb m952 xtr splined bottom bracket precision engineered shimano xtr sealed cartridge bottom bracket for m95x series xtr chainsets large 222 mm diameter chrome moly pipe billet spindle with 8 splines forms rigid and strong interface with xtr cranks ball and roller bearings reduce flex maintenance free sealed cartridge design prevents ingress of water and dirt aluminium adapter includes bottom bracket installation tool available in 68 or 73 mm shell widths and 112 or 116 mm