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Ships within 48 hours · Estimated delivery Oct 10 - Oct 15
Custom Fit & Comfort – dual BOA® L6Z dials and a surround wrapping upper adapt to a wide range of foot shapes
SyncDrive motor technology smooths out bumps along the ride
This buttery smooth endurance road bike helps you do more of what you love
GRX Di2 RX815 / RX817
and enjoy the seamless feel of Shimano Di2
Shimano RD-R8150 Ultegra Di2 12-Speed Rear Derailleur trinity Custom Fit & Comfort –Now simplified with a single derailleur cage length, the new 12 speed Shimano ULTEGRA R8150 rear derailleur packs our fastest, most precise shifting into a more approachable option. With our fastest, most accurate shifting, the new 12 speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28 34T low sprockets.