Originally Posted by datlas

Chilly ride. There were some icy sections from frozen runoff. We were extra careful but a friend went down at about 3MPH on a full-width ice patch…he seemed to be ok and we resumed, but his RD shifting was wonky on the easier gears and we thought he may have bent the RD hanger inward from the crash. A few miles later he shifted and the whole RD came off. He had to make the call of shame. He rides Di2 and the wire broke so the black wire coming out of the RD has 1 cm of shiny copper wire showing. He was upset that he may need a new RD. I suggested this may be a common enough occurrence that it could be reconnected and all he needs is a new RD hanger. But I don’t know squat about Di2, so unknown if it’s an easy fix (or not). Anyone know?