Shimano Ultegra R8000 Jockey WheelsThis superb pulley set is specifically designed for use with Shimano Ultegra R8000 rear derailleurs. Ready for an unbeatable level of performance, these brilliant jockey wheels offer low friction and smooth running as you soar from the city streets to the countryside.    Features: Use: Road Speed: 11 speed Compatibility: Shimano Ultegra R8000 rear derailleurs Part Number: Y3E998010A 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.