The Altus FC-M311 crankset for square bottom brackets features a rigid 2-piece construction and Hyperdrive SG-X chainrings. The pre-installed chain guard (optional selectable) keeps your legs and pants clean. The crankset is Dual SIS compatible.

Chain guard compatible.
Chainwheel, number of teeth: 42x32x22
Fitting for derailleur: 7-speed ||| 8-speed
Material: aluminum, steel
Type of chain: HG 7/8-speed