VGEBY1 Bike Derailleur Pulley, 2Pcs 11T/13T Bike Guide Roller Ceramic Bearing Rear Pulley Wheel with Hole Adapter (11T-Golden)

• IMPROVE EFFICIENCY: Adopting aluminum alloy and ceramic material, this product is very to use, ceramic material can reduce drag force which can improve cycling efficiency.
• MORE PRACTICAL: Positive and negative tooth guide wheel, no strange voice and faster speed, can be applied for most mountain bike. Supporting for various speed shifting.
• EASY TO INSTALL: With installation hole adapter tubes, suitable for use 4 / 5 / 6 mm guide wheel screws. Offers you a better cycling experience.
• CONVENIENT FOR USE: Light weight, will not bring extra burden to the bicycle, fine workmanship, small dimensional error, short running-in period, can be quickly installed and put into use.
• SERVICE GUARANTEE: If you have any questions about our products, please send us an email and we will get back to you as soon as possible within 24 hours to solve the problem for you.

Features: IMPROVE EFFICIENCY: Adopting aluminum alloy and ceramic material, this product is very to use, ceramic material can reduce drag force which can improve cycling efficiency. MORE PRACTICAL: Positive and negative tooth guide wheel, no strange voice and faster speed, can be applied for most mountain bike. Supporting for various speed shifting. EASY TO INSTALL: With installation hole adapter tubes, suitable for use 4 / 5 / 6 mm guide wheel screws. Offers you a better cycling experience. CONVENIENT FOR USE: Light weight, will not bring extra burden to the bicycle, fine workmanship, small dimensional error, short running-in period, can be quickly installed and put into use. SERVICE GUARANTEE: If you have any questions about our products, please send us an email and we will get back to you as soon as possible within 24 hours to solve the problem for you. Specifications: Item: Bike Guide Roller Material: Aluminum Alloy + Ceramic Colour: Black, Golden (Optional) Diameter: 4 cm / 1.6 inch (11 T), 5 cm / 2.0 inch (13 T) Weight: 21-23 g Package Included: 2 * Bike Guide Roller 2 * Installation Hole Adapter Tubes (Other things on the pictures are not included)