Originally Posted by
ahultin
I have the following parts in my cart and wanted to run it by here to see if we are on the right track. Any help would be appreciated.
Do you have a custom length of EW-SD50 cable that is long enough to go from the shifters to the rear bottom bracket? Do your bottom bracket shells have openings to allow the cable to thread through? Make sure that your BB won't interfere with the cable. This is part of the reason why I use the Bushnell Lightweight eccentric without the full shell.
Before you modify the frame, test the setup by temporarily mounting the battery externally. If everything works fine, it's not difficult to drill holes at the headtube, rear BB, and R chainstay. I suggest that you talk to Calfee because they modify all brands of carbon frames, and Di2 conversion is one of their services.