Shimano Ultegra RD-R8150A Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Run Accessories Brand_BibBoards the X-Vent doesn't sacrifice on

the X-Vent doesn't sacrifice on performance features

and represents the ultimate in performance

Activity: road cycling

when paired with your compatible smartphone

Shimano Ultegra RD-R8150A Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black Run Accessories Brand_BibBoards the X-Vent doesn't sacrifice onWith 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