Gates rear sprockets are used in conjunction with a Gates belt (belt not included) instead of a chain. Gates uses 4 types of product lines. These product lines are often used by Gates to indicate for which type of bicycles the part is intended. This product belongs to product line: CDX: powerful commuter bikes, trekking bikes, mountain bikes, cargo bikes and e-bikes, and extreme conditionsProduct line: CDXCompatible: Any Shimano BodyMounting: Freewheel hub with 9 splinesMounting type: 9 splinesMaterial: Stainless SteelFinish/Color: SilverGates Article Number: 738168EAN code: 4262428333771Supplier number: 78980480-AMRetail packaging: Yes