You'd be better off with a smaller range cassette like 11-30. This will give you closer spacing to fine tune your cadence and still have the same range. This would even allow you to throw that 53 chainring on (do you often find yourself pedaling at 40+ mph?) without having to get a longer chain, because the chainwrap will still be about the same. 53/39/30 is a common setup on triples.
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