The rear derailleur pulley is used in the rear derailleur for chain transport and shifting. A must have accessory for bicycles. Bicycle Rear Derailleur 11T/13T Bearing Jockey Wheel Pulley for 9/10/11 Speed.
13T Sealed Bearing Jockey Wheel Rear Derailleur Pulley 4mm 5mm 6mm for Road Bike
11T / 13T Aluminum Sealed Bearing Rider Wheel Rear Derailleur Pulley
Aluminum Sealed Bearing for Wheel Rear Derailleur Pulley 11T 13T 15T
2pcs 11T-13T MTB Road Bike Aluminum Bearing Jockey Wheel Rear Derailleur Pulley
11T-13T MTB Road Bike Aluminum Bearing Jockey Wheel Rear Derailleur Pulley
2pcs 11T MTB Road Bike Aluminum Bearing Jockey Wheel Rear Derailleur Pulley
