Gates rear sprockets are used in conjunction with a Gates belt (belt not included) instead of a chain. Gates uses 4 product lines. These product lines are often used by Gates to indicate the type of bicycles for which 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: RVVFinish/colour: SilverGates Article number: 738172EAN code: 4262428333719Supplier number: 78980551-AMRetail packaging: No