Originally Posted by
Steve B.
I’d go looking for a bike with Di2, as this is likely a $1600 swap out.
But maybe wait, as a lot of deals are using the 6870 group. The newer 8050 shifters are a bit nicer and maybe worth the time and money. As well the 8050 gets the little buttons on top which work well with Garmin and other GPS computers.
I did it for about 1/2 that with the wireless unit around Christmas of 2016 ordering from UK. Was just a mechanical 6870 upgrade as I already had usable crank, cassette, brakes, etc. I did have to get a long cage RD, but I was able to find a short cage mechanical 6870-SS for $30 from the same site and just swapped the cages between the two.