1. Product name:Bicycle rear derailleur guide wheel
2. Material: aluminum alloy + ceramic bearing
3. Weight: 15g
4. Color: silver, black, red, blue, gold
5. Size: Diameter: 14T about 55mm /15T about 57mm /16T about 63mm
6. Installation size: 4/5/6mm axis
7. Product features:
1) Steel frame, ceramic balls, aluminum alloy body
2) Unobstructed lubrication, durable, lighter, faster, and more labor-saving
3) Lightweight design, smooth rotation, polishing and anodizing