Shimano Ultegra RD-R8150F Di2 Rear Derailleur - 12-Speed, Medium Cage, Includes TL-EW300, Black

With 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. Product Specifics Largest Cog: 34 Rear Der/Shifter Compatibility: Shimano Road Di2 Rear Derailleur Mount Type: Shimano Rear Direct Mount Rear Derailleur Mount Type: 10x1 Standard Drivetrain Speeds: 12 Chain Wrap Capacity (teeth): 39 Cage Length: Medium Color: Black Today's Stock Status 10+ Available to ship in 2-4 Business Days UPC: 192790240961 EAN: Not available Manufacturer Part Number: Does Not Apply RD0094 181494-Q0-L