11T Bicycle Rear Derailleur Jockey Wheel Ceramic Bearing Aluminum Alloy MTB Mountain Bike Guide Roller. 1 X 11T Bicycle Rear Derailleur Guide Roller. Screw hole of rear gear: 8.9mm/0.35". Material: Aluminum alloy.
Derailleur Jockey Wheel Ceramic Bearing Aluminum Alloy MTB Mountain Bike Guide
Jockey Wheel Ceramic Bearing Aluminum Alloy MTB Mountain Bike Guide Roller
Derailleur Jockey Wheel Ceramic Bearing Aluminum Alloy MTB Mountain Bike Guide N
Rear Derailleur Jockey Wheel Ceramic Bearing Aluminum Alloy MTB Mountain Bike