Gates front sprockets are used in combination with a Gates belt (belt not included) instead of a chain. This sprocket is optimised for Di2 drivetrains. Please refer to the Gates Carbon Drive Bicycle Calculator to determine the correct part. Gates uses 4 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: high-performance commuter bikes, trekking bikes, mountain bikes, cargo bikes and e-bikes, and extreme conditions.Product line: CDXMounting type: 5 bolts and BCD of 130 mmMaterial: 6061 aluminiumFinish/colour: Black anodisedGates Article number: 738037 EAN code: 4262428333191 Supplier number: 78980239-AM Retail packaging: Yes