Shimano Ultegra Di2 RD-R8050-GS Outer Plate and Bolt New (Long Cage) | eBay
Shimano Ultegra Di2 RD-R8050 GS 11s Road Bike Rear Derailleur Medium Cage 34T CX | eBay
Shimano Ultegra RD-R8000 GS 11Spd Shadow Rear Derailleur - SoCal Bike - Oceanside, Carlsbad and north San Diego county's favorite bike shop, Bicycle and ebike rentals, sales, and service
Shimano -805-gs Di2 Bike Rear Derailleur 11-speed Bicycle - AliExpress
Amazon.com : Shimano Ultegra RD-R8050-GS Di2 Rear Derailleur - 11-Speed, Medium Cage, Black : Sports & Outdoors