/ Indexing Issues
I'm looking for any advice people may have on how to get this to work correctly.
Go to the Park Tools website and print off the relevant 'how to' guide. Provides all the information you need, but sadly none of the skill
If everything's set up right but still skipping as you describe could be worth replacing the cabling, sticky cables can make it impossible to get indexing to work correctly as they introduce hysteresis to what should be a linear system.
I've had this problem on a mtg (deore xt); turned out the shifter was broken and and was 'missing' a stop (i.e. there were less indexed positions than there should have been). This was after a fairly catastrophic broken derailleur hanger.
Check that the cassette is fitted and torqued correctly, that the rear derailleur and hanger are not twisted and as has been mentioned above, clean and lube the cables.
When did you last replace the cable outer where it curves around to the rear derailleur? They get sticky and rusted up and normal gear selection stops happening. Get your bike shop to cut you a new piece (two or three actually, for future use) and replace, while giving the inner cable a good clean and a light lube or fit a new inner. You'll be amazed at the deterioration in performance you've come to accept as normal.
More than likely cable sticking and set up wrong though. Crofty
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