Shimano Ultegra R8000 Rd-r8000 Rx800 Road Bike Bicycle 11 Speed Rear Derailleur Ss/gs Short Cage/medium Cage Original Shimano - Bicycle Derailleur - AliExpress
Shimano Ultegra R8000 2x11 Speed Groupset Left+right Shifter Front+rear Derailleur Ss / Gs Original Parts For Road Bike - Bicycle Derailleur - AliExpress
Shimano Ultegra (R8000 GS) exploded view - #4285A November 2017