PREMIUM ALUMINUM ALLOY: This bike derailleur pulley adopts quality aluminum alloy and ceramic material to ensure to use. It also can reduce drag force which can improve cycling efficiency.
WIDE ADOPTIONS: It is suitable for 4 / 5 / 6 mm wheel screws and offers you a better cycling experience.
EXQUISITE CRAFTSMENSHIP: It made of CNC processing that ensure the premium quality.
EASY INSTALLATION: This wheel rear can be applied for most mountain bike and supplied for various speed shifting. With two bike roller and hole adapter tube are easy to install.
GUARANTEE: Our product have 180 days , if you have any question about this product, please feel to us, we will try our best to help you solve your problem.