Shimano Altus FC-M311 Cranksets feature aluminum crankarms with steel SG-X chainrings for reliable shifting. Hyperdrive integrated SG-X chainrings provide precise and reliable front shifting Proven 3-pc. design 187.9 Q-factor Chainguard model 175mm 7/8-Spe
Shimano Altus FC-M311 Cranksets feature aluminum crankarms with steel SG-X chainrings for reliable shifting.
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