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Chainrings look close together, should there be (or could you add) shims between the inner ring and the spider?
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Can't remember exactly but is the inner ring "ramped" around the bolts? I know the outer is and looks to be the right way round.
I ran 8 speed when I first used them before changing the rings and don't remember having that issue, maybe my chainstays were longer...
gbj_tester
atk
@TvH
Only thing I can think of is that the 9sp chain is too wide, but 6.6 to 5.8(?) doesn't sound like enough of a difference