Lightweight 11T Mountain Bike Rear Derailleur Pulley Wheel (Black Red)

Aluminum alloy wheel body, lightweight, high strength, anti-rust and . The steel bearing has good performance in rolling smoothly with great stability, low chance of getting chain stuck. Compatible for most of rear derailleur on the market. Features: 1. Aluminum alloy wheel body, lightweight,high strength, anti-rust and . 2. The steel bearing has good performance inrolling smoothly with great stability, low chance of getting chain stuck. 3. Compatible for most of rear derailleur on themarket. 4. Fit for 4Celsius5mm roller screw shaft with thescrew shaft adapter. 5. A must-have replacement part for your bike. Specification: Material: Aluminum Alloy, Steel Optional Color: Black Red, Black Type: 11T Fit for most of rear derailleur on the market Size: Approx. 41.5mmCelsius1.63in Weight: Approx.15gCelsius0.53oz PackingList: 1 * Bike Rear Derailleur Pulley 2 * Screw Shaft Adapter Note:  One of the screw shaft adapter has been installed on the pulley.