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Will there be a drastic change is shift quality?
The inner ring makes no difference, all the magic happens on the outer ring.
There might be a slight change if the new inner is clocked differently from the original, so be sure to check and if necessary rotate it to line up in the way the outer is expecting to be fed.
Anyone used mismatched chainrings?
have a rotor outer ring and looking to replace the inner. The rotor one is $$$ so was looking at cheaper alternatives.
Will there be a drastic change is shift quality?