My rear derailleur shifter cable just broke for the third time in two years 5000 miles/ 8000km. I was lucky this time. It broke a mile from the end of a long ride.
What am I doing wrong? Are there cables that don't break as easily? Or do I just have to replace those cables every 1000 miles?
Edit It breaks inside the shifter, right where it's the biggest possible pain in the xxx neck to get the broken mushroom head out.
The design is pretty bad. The very end of the cable wraps around a small-radius capstan, and gets bent when downshifting and straightened when upshifting. My high school physics teacher showed his class how to do that repeatedly to induce metal fatigue and break an otherwise strong stainless steel cable.