Bike Rear Derailleur Pulley 11T Ceramic Bearings CNC Aluminum Alloy Bike Guide Wheel for 8 9 10 11 Speed Derailleur

Feature: 1. Improve Cycle Efficiency: Bike guide wheel not only reduce drag and increase cycle efficiency, but are also very durable. 2. Ceramic Bearings: The bike rear derailleur uses ceramic bearings that defend the center fastener derailleur of the bike. 3. CNC Aluminum Alloy: Bike guide wheel is made of CNC aluminum alloy, which is light weight, durable and has a long service life. 4. Corrosion Resistant: Bike idler pulleys are anodized for rust and corrosion resistance. So it can be used for a long time with good performance. 5. Compatible: Bike derailleur accessories are compatible with most rear derailleurs on the market for your convenience. Specification: Item Type: Bike Rear Derailleur Pulley Material: Aluminum Alloy Product Specification: 11T Applicable Products: Approx. 4mm 0.16in, Approx. 5mm 0.2in, Approx. 6mm 0.24in Screw Hole Diameter Product Application: 8, 9, 10, 11 Speed Transmission System. Package List: 1 x Bike Guide Wheel2 x Reducing Sleeve2 x Retaining Hats