Features: Adopting aluminum alloy and ceramic material, this product is very durable to use. Can be applied replacement for most mountain bike. Supporting replacement for various speed shifting. Suitable replacement for use 4 / 5 / 6 mm guide wheel screws. Offers you a better cycling experience.
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)