Shimano RD-R8150 Ultegra Di2 Rear Derailleur

With the fast and accurate Di2 shifting technology, the Shimano 12-speed Ultegra RD-R8150 rear derailleur is extremely versatile thanks to a single medium 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.