Alomejor Bike Derailleur Pulley Aluminum Sealed Bearing Wheel Bicycle Guide Wheel Rear Derailleur Pulleys 12T Ceramic Aluminum Wheel Rear Fit 4/5/6mm Screws Support 7/8/9/10 speed (Red)

PREMIUM ALUMINUM ALLOY: This bike derailleur pulley adopts quality aluminum alloy and ceramic material to ensure durable to use. It also can reduce drag force which can improve cycling efficiency. COMPATIBILITY: This product is compatible for most of rear derailleur on the market and adjust to 7/8/9/10 speed and fit 4/5/6mm screws. LIGHTWEIGHT: Since its high quality material,the Jockey wheel rear is portable and lightweight. ENSURE FAST SPEED: The positive and negative tooth guide wheel won't make some noise and guarantee the faster speed. GUARANTEE£º If you are not satisfied with our product you received, you can send emails to us at any time. We will reply you instantly and help you solve your problem.