I have a 2015 Felt AR1 and it was originally built up with Sram Red, but i am converting to Ultegra Di2. This setup requires an internal seatpost mount for the battery. Does anyone know or can link me to a picture of what the internal seatpost mount for the Di2 looks like?
My LBS said i should have it, because it came with the bike. But i cant seem to find it, or actually i am not sure what i am even looking for.
any help would be appreciated!