Originally Posted by
Brian Ratliff
On Shimano (external routed shift cable), I inspect the right side cable (rear) regularly for fraying. I've had two of these break on me. The breakage is always preceded by a degradation in shifting precision.
I had that happen a few months ago. I had to rip that sucker outta there, but that was before I knew saw what the problem was. I'll probably do it a little more delicately next time.