Gates front sprockets are used in conjunction with a Gates belt (belt not included) instead of a chain. Consult the Gates Carbon Drive Bicycle Calculator to determine the correct part. Gates uses 4 types of product lines. These product lines are often used by Gates to indicate for which types of bicycles the part is intended. This product belongs to product line: CDX: powerful commuting bikes, trekking bikes, mountain bikes, cargo bikes, and e-bikes, and extreme conditionsProduct line: CDXMaterial: 6061 aluminiumFinish/colour: Black anodizedGates Article number: 739963 EAN code: 4262428338486 Supplier number: 78701002-AM Retail packaging: Yes