Gates front sprockets are used in combination with a Gates belt (belt not included) instead of a chain. This sprocket is optimized 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 component 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: CDX Mounting type: 5 bolts and BCD of 130 mm Material: 6061 aluminum Finish/color: Black anodized Gates Article number: 738141 EAN code: 4262428333184 Supplier number: 78980251-AM Retail packaging: Yes