The Shimano FC-M311 crankset is Dual SIS compatible and comes with a pre-installed chain guard. It features a rigid 2-piece construction and Hyperdrive SG-X chainrings, delivering fast and smooth gear shifting for off-road lovers. Made of aluminium and steel, it's in black colour. The crank length is 170mm, with tooth numbers of 48x38x28. It fits Shimano 3x7/8-speed derailleurs, has a square axle profile, a 123mm BB axle length, an HG 7/8-speed chain type, and a 50mm chainline.

Using this Shimano FC - M311 front crankset is easy. First, make sure it's properly installed on your bike according to the bike's specifications. When riding off - road, shift gears smoothly by using your bike's shifters. The Dual SIS compatibility ensures a good gear - changing experience. As for maintenance, regularly clean the chainrings and the chain guard. Wipe them down with a clean cloth after each ride, especially if you've been in muddy or dusty conditions. Check the tightness of the bolts periodically to make sure they're secure. Also, lubricate the moving parts like the chain regularly to keep the gear - shifting performance at its best. Be careful when riding over rough terrain to avoid hitting the crankset against rocks or other hard objects, as this could damage it.