Shimano Ultegra Rear Derailleur Di2 12Spd RD-R8150 over shoes It's built with 7-speed internal

It's built with 7-speed internal gearing

this bike meets the demands of your next epic ride

Our new Infinity hub platform optimizes stiffness and power transfer

the clean lines and straight bars give it a nice

compliant and balanced for a wide variety of road riding enthusiasts

Shimano Ultegra Rear Derailleur Di2 12Spd RD-R8150 over shoes It's built with 7-speed internalDescription Ultegra Shadow design with Di2 technology, shifting is easy and precise just a light touch, as soft as a mouse click, is sufficient for the front or rear derailleur to instantaneously select the correct gear The rear derailleur is now the brains of the system with wireless connectivity to the shifters. It acts as the point the system is charged, provides ANT+ connection to 3rd party devises and replaces the handlebar junction Button on the