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Hyperdrive SG-X chainrings for fast and smooth gear shifts 7/8-speed compatible steel chainrings For use with 123 mm square taper bottom brackets With a 51.8 mm (boost) chainline for use in conjunction with 148 mm O.L.D.
Hyperdrive SG-X chainrings for fast and smooth gear shifts 7/8-speed compatible steel chainrings For use with 123 mm square taper bottom brackets With a 51.8 mm (boost) chainline for use in conjunction with 148 mm O.L.D.