Shimano Dura Ace R9100/R9150 Jockey WheelsThis superb pulley set is specifically designed for use with Shimano Dura Ace R9100 and R9150 rear derailleurs. Ready for an unparalleled level of performance, these brilliant jockey wheels use sealed precision bearings to ensure low friction and smooth running.    Features: Speed: 11 speed Compatibility: Shimano Dura Ace R9100 and R9150 rear derailleurs Bearings: Sealed precision bearings Part Number: Y5ZR98010A 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.