?Specifications? Type: Rear Guide Wheel Material: Aluminum Alloy + Ceramic Colour: Red Support for 7 / 8 / 9 /10 speed bike Diametre: 2 inch (50mm) Thickness: 0.34 inch (8.5mm) Teeth: 12 ?Features? 1. Adopting quality aluminum alloy, this product is durable to use 2. Positive and negative tooth guide wheel, no strange vioce and faster speed 3. Ceramic material can reduce drag force which can improve cycling efficiency 4. Stronger compatibility with flexible rotation 5. Suitable for use 4 / 5 / 6 mm guide wheel screws ?NOTE!!? The installation range of the guide wheel must be greater than 2inch/50mm diameter ?Package include? 1 * Rear Guide Wheel 2 * Installation Hole Adapters

?12T Rear Derailleur Pulley?Suitable for most rear derailleur of 12 teeth in the market and use 4 / 5 / 6 mm guide wheel screws. NOTE: Installation range needs to be greater than 2 inch/50mm. ?Smooth Ride?Deep toothed guide wheel to reduce chain drop. Positive and negative tooth guide wheel can effectively inhibit the horizontal swing of the chain, so that the speed is more accurate. ?Ceramic Guide Pulley?Ceramic material can reduce drag force which can improve cycling efficiency. Ceramics bearing, super lubricating, noiseless!. ?Lightweight & Durable?Made of quality aluminum alloy with fully sealed bearing for center bolt derailleurs, Durable to use and longer life. ?Bike Guide Roller?Diameter: 2 inch / 50cm; Teeth: 12T. Stronger compatibility with flexible rotation!.

Case Material: Aluminum. Auto Part Position: Rear. Material: Aluminum Alloy + Ceramic. Brand: Saipe. Date First Available: May 4, 2020. Best Sellers Rank: #298,490 in Sports & Outdoors. Customer Reviews: 4.1 out of 5 stars 42 ratings 4.1 out of 5 stars. : B0881XQSVR. Part Number: ?739515546979. Manufacturer: ?Saipe. Material: ?Aluminum Alloy + Ceramic. Brand Name: ?Saipe. Package Weight: ?0.01 Kilograms. Item Package Dimensions L x W x H: ?3.54 x 2.87 x 0.35 inches.