Ultegra R8150 Di2 Rear Derailleur (12-Speed)

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.

FEATURES:

• 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.

SPECS:

• Largest Cog:34
• Rear Derailleur Mount Type:Shimano Rear Direct Mount , 10×1 Standard
• Chain Wrap Capacity (teeth):39
• Rear Der/Shifter Compatibility:Shimano Road Di2
• Cage Length:Medium
• Drivetrain Speeds:12