Aluminum Alloy 11T 13T Rear Derailleur Pulley for Improved Ride Experience

11T 13T Steel Bearing Bicycle Derailleur Pulley Wheel for Mountain Bike Parts

11T13T Rear Derailleur Guide Wheel Bicycle Compatible 4 5 6mm Screw Hole

11T 13T Bicycle Derailleur Pulley Wheel Steel Bearing Guide Compatible with MTB

11T Rear Derailleur Pulley Aluminum Alloy CNC Guide Wheel for Accurate Shifting

Compact Design 11T Bicycle Rear Derailleur Pulley Wheel with Accessories

Bike Maintenance Rear Derailleur Tool Precision B-screw Tuning Hook Hole Storage