Originally Posted by
Koyote
Which drivetrains? If Shimano 11sp, I recommend that, at minimum, you replace the RD cables. They really do go quickly -- you'll notice a couple times that you 'click' the shifter and nothing happens, and then...You're single-speeding. I've gotten as little as 1500 miles out of a cable. It's not a Koyote problem -- it's a known issue. Pops up in threads here on bf all the time.
Shimano 105 11 speed drivetrain.
Strava indicates that I have ~2900 miles on my Domane. Still shifts like the day I bought it. The girls bike is one year older and has more miles...also still shifts fine.
Not sure what bike you have, but your cable routing must have some really tight bends for it to be breaking twice a year on you.