Rear Bearing Guide Roller 1 Pair Bearing Rear Pulley Jockey Wheel Bicycle Guide Roller

Features:
Adopting aluminum alloy and ceramic material, this product is very durable to use.
Can be applied for most mountain bikes.
Support various gear changes.
Suitable for the use of 4 / 5 / 6 mm guide wheel screws.
Give you a better cycling experience.

Specification:
Item: Bicycle Guide Roller
Material: Aluminum Alloy + Ceramic
Color: Black, Golden (Optional)
Diameter: 4 cm / 1.6 in (11 T), 5 cm / 2.0in(13T)
Weight: 21-23g
Package included:
2*Bike Guide Roller
2*Installation Hole Adapter Tubes
(The other items in the pictures are not included)