Upgrading or replacing the drivetrain on your older mountain or hybrid bike? This Shimano Altus FC-M311 crankset is a reliable and affordable workhorse. It features 170mm long crank arms, a 48/38/28-tooth triple chainring setup, and a square taper bottom bracket interface. It's designed for 7 or 8-speed systems. The chainrings are riveted (not replaceable individually), but the whole unit offers solid shifting and durability for casual riding. It's brand new in the box, black in color, and comes from Shimano, so you know the quality is good. Perfect for a bike build, a repair job, or giving an old bike new life. Installation requires specific tools (crank puller, bottom bracket tools), but any bike shop can handle it if you're not DIY-inclined. A great value crankset for everyday cycling.
