Originally Posted by
Crankycrank
Is the cable routed on the correct side of the derailleur mounting bolt? #2 in the instructions.
SI-5LX0B-001-ENG.pdf
that can't suddenly CHANGE during a ride.
but a cable can begin to fray inside the brifter... we all know this happens...
another possibility is the cable getting misrouted or fraying where it passes under the bottom bracket...