MUQZI 11T/12T/13T Bike Rear Derailleur Pulley Roller Idler Bearing Jockey Wheel Pulley Set for MTB M…See more

Features & details Features 【High Quality】- Made of aluminum alloy material, with upgraded CNC process.

Our Bike Jockey Wheel Pulley is lightweight but durable, anti-corrosion and anti-rust.

【Ceramic Bearing Pulley】- New upgrade design, with ceramic bearing, can reduce the resistance during cycling, which ensures fast and sensitive working.

Improve riding efficiency.

【Package Included】- Come with 2PCS Bicycle Rear Derailleur Pulleys, 2PCS Bike Rear Derailleur Bolts, and 2PCS 4mm Adapters, 2PCS 5mm Adapters.

Can be converted into 4/5mm bearings after installation.

【Compatible Design】- Our Bike Rear Derailleur Pulley is more compatible, it fits almost all mountain bikes and road bikes.

In addition, it is also suitable for other bicycles with rear derailleur.

【Multi-size】- 11T/12T/13T.

Please choose the same size as your original pulley.

If not totally the same, choose the smaller size, never choose the bigger than the original ones.