Originally Posted by
swag72
I went from mechanical 105 to Di2 Ultegra on my new bike. The electronic Ultegra is lovely and I would not go back to mechanical. I feel it is more precise, quicker to change and gives me much more confidence to change on climbs that the mechanical 105 didn't do.
I cheated. Went from 105/5800 group, kept the 105 brakes and crank, swapped the shifters, derailers to Ultegra Di2. Very cost effective and no issues.