RD: your 11 speed Rear Derailleur. This was tested with the Ultegra RD-6870. Should work with DURA-ACE RD-9070 as well. Battery: your external battery. This was tested with SM-BMR2. Technically we are ...

As part of the trip to Spring Valley, MN, I joined other journalists in racing the Almanzo 100 gravel race on an Allied Alfa All-Road bike equipped with the new Di2 Ultegra RX805 rear derailleur. By ...