Originally Posted by
andrewclaus
And pay attention to cable adjustment issues. I'll guess you've had to fiddle with the barrel adjusters a couple of times in the past few weeks or months. That's a watch-out situation.
I hear some Shimano shifter models are worse than others, but the models I've had over the decades will eat a cable in a few years with about 6000 miles/year of mountain and foothills riding, so a fair amount of shifting. I inspect every year and have never caught it that way. After two breaks on the road, I'm now really good about checking the cable every time I need to change the barrel adjuster.
I've learnt that as well. I will surely change my cable yearly and inspect my braking cable as well.
It had shifting problem prior to this incident, I thought it was just because the derailleur hanger wasn't straight and wasn't bothered to solve it, and now I know that the cable will indeed affect shifting performance and might get stuck inside the shifter.