![Amazon.com : Shimano Rear DERAILLEUR, RD-R8000, ULTEGRA, GS 11-Speed, Shadow Design, Direct Attachment, W/OT-RS900(Black) : Sports & Outdoors Amazon.com : Shimano Rear DERAILLEUR, RD-R8000, ULTEGRA, GS 11-Speed, Shadow Design, Direct Attachment, W/OT-RS900(Black) : Sports & Outdoors](https://images-na.ssl-images-amazon.com/images/I/61ssiG2XibL._AC_UL210_SR210,210_.jpg)
Amazon.com : Shimano Rear DERAILLEUR, RD-R8000, ULTEGRA, GS 11-Speed, Shadow Design, Direct Attachment, W/OT-RS900(Black) : Sports & Outdoors
![Shimano Ultegra RD-6800/6870 11-Speed Rear Derailleur Pulley Set – On Your Mark Performance Center | (561) 842-2453 Shimano Ultegra RD-6800/6870 11-Speed Rear Derailleur Pulley Set – On Your Mark Performance Center | (561) 842-2453](https://www.oymbike.com/cdn/shop/products/pulleywheels.png?v=1608758719)
Shimano Ultegra RD-6800/6870 11-Speed Rear Derailleur Pulley Set – On Your Mark Performance Center | (561) 842-2453
![Hi! I have these Ultegra 6700 shifters and a Deore 9 speed rear derailleur. They work fine, but they "lose adjustment" pretty easily. I'm thinking about upgrade into this Shimano GRX RD-RX400 ( Hi! I have these Ultegra 6700 shifters and a Deore 9 speed rear derailleur. They work fine, but they "lose adjustment" pretty easily. I'm thinking about upgrade into this Shimano GRX RD-RX400 (](https://i.redd.it/lgvgl68esbj71.png)
Hi! I have these Ultegra 6700 shifters and a Deore 9 speed rear derailleur. They work fine, but they "lose adjustment" pretty easily. I'm thinking about upgrade into this Shimano GRX RD-RX400 (
![Amazon.com : Shimano Ultegra 6800 11-Speed Rear Derailleur Pulley Set: Version 2 : Sports & Outdoors Amazon.com : Shimano Ultegra 6800 11-Speed Rear Derailleur Pulley Set: Version 2 : Sports & Outdoors](https://m.media-amazon.com/images/I/51xIgQBk-5L._AC_UF1000,1000_QL80_.jpg)