FC-M171 6/7/8-Speed Shimano Mountain Bike Crankset - 170mm, 24-34-42T FC-M171 6/7/8s Shimano Mountain Bike Bicycle Crankset Chainwheel 6 7 8 Speed 170mm 24-34-42T Model Number: FC-M171 Use: Mountain Bikes Category: Chainwheel Name: SHIMANO Origin: Malaysia This product is an OEM version of the original Shimano component, designed for use in bicycle manufacturing. OEM parts are supplied to bike manufacturers for assembly into complete bicycles and are not packaged for retail sale. These components are functionally identical to their consumer counterparts but are distributed without retail packaging, making them a cost-effective option for replacements or repairs. For example, when purchasing a bicycle from a bike shop, the components on the bike typically come through the OEM supply channel. If a part such as a tire needs replacement, a consumer would usually purchase the retail packaged version from a store.