Chainset Steel Triple Crankset BLACK 170mm Crank Arms MTB Bike Bicycle Feature: 100% Brand new and high quality. Safe, practical, without fear of mountain roads. High tenacity plastic protective shell, anti oil stain of trousers feet. High strength steel tooth plate, aluminum alloy crank and plastic high strength chain guard cover, Strong and durable, not easy to deform. Fit for MTB, Track Road Bike, Fixed-Gear Bicycle, Folding Bike. Specification: .