Shimano Ultegra RD-R8000-GS Rear Derailleur - 11 Speed, Medium Cage, Black 2017 Ships within United States Buy Online or Click & Collect Share Loading Facebook Like button... Shimano Ultegra RD-R8000-GS Rear Derailleur - 11 Speed, Medium Cage, Black 2017 Ships within United States Buy Online or Click & Collect Share Loading Facebook Like button...