Shimano Ultegra RD-R8150A Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Apparel Brand_Louis Garneau AmFIB softshell covers and protects

AmFIB softshell covers and protects the front of the leg

Use Di2 system checker to update component firmware from http://e-tubeproject

head alloy 6061

Retro-Inspired Design

Shimano Ultegra RD-R8150A Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Apparel Brand_Louis Garneau AmFIB softshell covers and protectsWith the fast and accurate Di2 shifting technology, the Shimano 12 speed Ultegra RD R8150 rear derailleur is extremely versatile thanks to a single cage length option compatible with 11 28, 11 30, and 11 34 cassettes. Compact design includes an integrated wireless unit, charger, switch Wider range capacity Max. low sprocket 34t LED status indicator Battery indicator, pairing, adjust mode etc. Largest Cog: 34 Rear Derailleur Mount Type: Shimano Rear