Originally Posted by
hsuehhwa
My first ultegra di2 set came with 2013 Cannondale Evo. I had premium bike shops do overhaul once/twice a year. Our of curiosity, among the hundreds di2 you worked with, how many had >~20k miles + ~1.5 million ft climbing?
As I said, I'm satisfied with the durability of the 2013 ultegra di2. As a result, I upgraded to DA R9100 di2.
It's pretty hard to get that amount of climbing here in the Phoenix area, but many of those bikes had far more than 20k miles. I've seen a fair amount of broken Di2 rear derailleurs and shifters, but parts break when you wreck.
I didn't think you were unhappy with Di2, I was just pointing out that having multiple failures was a little out of the norm.