Sell MEROCA Bike Ceramic Derailleur Pulley 11t 13t Bearing Jockey Wheel Rear Adjust 7/8/9/10 Speed best price

Features: 1. Anti rust and corrosion material ensure long time use and resistant anodized machined bicycle jockey wheel ensure normal working. 2. This bike derailleur pulley adopts quality aluminum alloy and steel peilin material to ensure durable to use. It also can reduce drag force which can improve cycling efficiency. 3. It uses ceramic beads to protect the center bolt derailleur of the bicycle, and these pulleys run on smooth ball bearings. 4. This product is compatible for most of rear derailleur on the market and adjust to 7/8/9/10 speed . Material: 7005 Aluminium Alloy Components: Derailleurs Structure: Metal Peilin Bearings Color: Red, Blue, Silver etc.. Size: 11T, 13T (optional) Use: For 7/8/9/10 speed Diameter: 11T-40mm, 13T-50mm Quantity: 1pc Package Weight: approx. 20g-11T, 23g-13T Fit For: For 4/5/6mm roller screw axis