Chainwheel, Shimano FC-M311

Shimano Altus FC-M311 Crankset 170mm 7/8-Speed 42/32/22t Riveted Black

Shimano Altus FC-M311 Crankset - 170mm 7/8-Speed 42/32/22t Riveted Square Taper JIS Spindle Interface Black. Shimano Altus FC-M311 Cranksets feature aluminum crankarms with steel SG-X chainrings for reliable shifting.