Having a right old ‘mare with my gears.
Replaced the cassette (10 speed 11-42 Sunrace), chainring (30T uber components) and chain (stainless wippermann) a couple of weeks back. I previously put the rubbish shifting down to everything being a bit (read: very) worn, not sure that was the case.
I swapped the cassette and chainring for the same sizes.
I can get the indexing 95% there but not quite good enough.
I have checked the limit screws, and the barrel adjuster and i can’t get the shifting to be reliable up and down across the entirety of the cassette.
I have changed the cable inner and outer and even swapped out the rear mech.
Both of those improved matters slightly but not so much that I’m now happy.
Shifter is a couple of months old…so reasonably sure it’s not that.
Next thing to check is the hanger I reckon, which seeing as it’s a steel frame is non-replaceable but i’ll be able to easily bend it back with a hanger alignment tool (ordered)…
Sound right?
I’ve built 10s of bikes and replaced countless drivetrains and this is the first time I have had an issue with steel mech hanger. I suspect i might have just been a bit lucky?