Forged aluminum construction is stiff and strong Compact 50/34t chainring combo ensures low climbing gearing without sacrificing too much top-end speed SG-X chainrings ensure smooth shifting Both 7-speed or 8-speed drivetrain compatible Uses square taper bottom bracket (not included)
7/8-Speed compatible SG-X Steel chainrings Square taper JIS Fixing bolts not included Chain Compatibility: 3/32 Chainring BCD (mm): Riveted mm Color: Black Crank Intended Use: Road Pedal Spindle: 9/16 Rings: 34/50
Original Shimano parts guarantee that all components work perfectly for optimum performance and maximum safety and longevity.