Shimano FC-M311 3x8 Octalink 170 22/32/42

Chainguard,integrated design Hyperdrive SG-X chainrings Spindle Interface Type: Octalink V2 Pedal Spindle: 9/16" Chainring BCD: Riveted Crank-FD Type: Mountain Triple BB Included: No Crank Intended Use: Mountain Chain Compatibility:,3/32