This is driving me slightly loopy.
Had an X0 medium cage rear mech fitted recently with “tight” indexing so the shifting is nice and snappy. My friendly bike mechanic (who does race stuff for SRAM) fitted it.
For some reason the 2nd and 3rd lowest sprockets (correct name?!) have started becoming a problem – totally skips the 2nd one, very unhappy in the third lowest but okay in the lowest/largest one. Smooth as silk in all other gears.
Followed the instructions and fiddled about with the “b adjustment” screw but to no avail. It’s almost as if the mech has an issue? Not been crashed or anything recently.
Any ideas? I can get it looked at but it seems a bit minor for such an effort.
I use those two sprockets a lot though – riding “around” the issue is a PITA.
Cheers, Mr Gear Muppet.