Shimano Ultegra RD-RX800-GS Rear Derailleur - 11 Speed, Medium Cage, Black, With Clutch Compression Assembly and 6mm hexes plus holder

and 6mm hexes plus holder

- Updated design features a square 3/8" drive and also works with Pedro's Pro Socket Handle

Manufacturer Part Number: BBT-5/FR-11

Manufacturer Part Number: WH098

UPC: 821973371030

Shimano Ultegra RD-RX800-GS Rear Derailleur - 11 Speed, Medium Cage, Black, With Clutch Compression Assembly and 6mm hexes plus holderThe Ultegra RX Rear Derailleur brings Shimanos chain stabilizing technology road cycling drivetrains, delivering smooth and precise shifting over technical terrain. It expands road bike capabilities, inspiring confidence on any surface and drives the evolution of road cycling to include greater elements of adventure. The Ultegra RX Rear Derailleur is available in 11 speed Mechanical or Di2 compatible options. Shimano Shadow RD+ chain stabilizer