2: the guide wheel and the tension wheel are not distinct. It is necessary to readjust the length of the chain. 7075 aluminum alloy material, one price. Supports most dials on the market, supports 7/8/9/10 speed!
11T / 13T Aluminum Sealed Bearing Rider Wheel Rear Derailleur Pulley
Aluminum Sealed Bearing Jockey Wheel Rear Derailleur Pulley
13T Sealed Bearing Jockey Wheel Rear Derailleur Pulley 4mm 5mm 6mm for Road Bike
11T Sealed Bearing Jockey Wheel Rear Derailleur Pulley for Mountain Bike
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
