12T Bicycle Bike Rear Derailleur Pulley Guide Jockey Wheel Rainbow Color Music Stands Replace your missing or original

Replace your missing or original one with this unique item

1 Piece Fishing Sub-Line Length Ruler

Easy to Apply

Screw thread lid make it tight

12T Bicycle Bike Rear Derailleur Pulley Guide Jockey Wheel Rainbow Color Music Stands Replace your missing or originalITEM NAME: 12T Bicycle Bike Rear Derailleur Pulley Guide Jockey Wheel Rainbow Color img *{margin: 0; padding: 0;. Teeth: 12T. Stronger compatibility with rotation, Suitable for use 4 5 6 mm guide wheel screws. Specifications: 12T. Positive and negative tooth guide wheel can effectively inhibit the horizontal swing of the chain, make the speed change smoother and the chain is more stable.