ZTTO MTB Rear Derailleur Jockey Wheels 11T 13T AL7075 Bearing Pulley Set
ZTTO 11T/13T Bicycle Rear Derailleur Steel Bearing. Upgrade your drivetrain withZTTO CNC-machined AL7075 aluminum derailleur jockey wheels, available in11T and 13T sizes. Featuring smooth steel bearings and compatible with4mm, 5mm, and 6mm mounting bolts, these guide and tension pulleys reduce friction for improved shifting performance and drivetrain efficiency.