High-quality tuning bottom bracket for Shimano Hollowtech II and Race Face X-Type MTB/ATB cranksets. The R3 sealing system features a specially shaped sealing lip with steel-plate reinforcement. This makes sure the slide-on seal is firmly seated, defining and guaranteeing optimised function with low friction.
• BSA thread (1.37 x 24 tpi)
• For 68/73 mm shell width
• Bottom bracket cups: aluminium
• Stainless steel angular contact ball bearings
• Incl. washers, spacers and clamp bolt