Shimano
Shimano Ultegra RD-R8000/R8050 Pully Wheel Set
$19.95Jockey Wheels for Shimano Ultegra 11-speed. With 11 teeth. Set consists of guide pulley and tension pulley. With 11 teeth.
Compatible with the Ultegra R8000 and Ultegra Di2 R8050 rear derailleur.