SHIMANO ULTEGRA Rear Derailleur Di2 RD-R8150 12-speed
・Fastest ever rear shifting, 58% faster than RD-R9150
・Compact design includes an integrated wireless unit, charger, and switch
・LED status indicator
 »Battery indicator
 »Pairing
 »Adjust mode, etc.
・Wider range capacity
 »Max. low sprocket: 34T

Product Description
With the fastest, most accurate shifting, the new 12-speed ULTEGRA R8150 rear derailleur is more versatile than ever thanks to a single cage length option that is compatible with 28-34T low sprockets.