- Rear mech setup
Mech is Shimano Sora and done just short of 10k miles.
That is a lot of miles (10k=10 000). Mech is probably worn beyond use hence the up shifts ok but the down not since the mech can “open” more than expected due to wear. I’m surprised it does not try to shift back half a gear when you shift up. .Posted 1 year ago
The dreaded indexing of gears…
I’ve got this odd problem. New chain. New cassette. Fitted them. Went to fine tune…
When I shift up, all is good. Mech aligns nicely with each cog, no rattles, smooth changes and smooth running all the way.
When down shifting though, it’s as if it’s moving half a shift more. Fine through the low gears, but by the time it reaches the smaller cogs the mech is clearly way out of alignment, chains starting to rattle, and it just skips the 2nd from bottom cog entirely because it’s that far out.
Pretty sure it did the same on the old cassette and chain.
How can it shift up perfectly, but not down?
Bad setup? Bad mech? Bent hanger (looks relatively straight to the eye)?
Mech is Shimano Sora and done just short of 10k miles.Posted 1 year ago
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