The Deore SM-BB52 bottom bracket cups for Shimano cranksets with integrated axle offers better sealing performance than its predecessor the SM-BB51. The improved seal design results in smoother rotation and increased durability. For 68/73mm BB

• Compatible with: FC-T551, FC-T611, FC-M552, FC-M590, FC-M610, FC-M612, FC-M615, FC-M622, FC-M625, FC-M640, FC-M645
• Fits 68 and 73 mm shells.