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I'm no faster on 53:39 than I am on 50:34.. Anyone who thinks they need anything bigger than a 50:12 (109" is huge) for general riding is either a hero or willy waving... Or just needs to learn to pedal.
The real benefit of proper road doubles is that you can use the small ring for more than just bailing out on hills and spread the chainring wear out a bit. You get to spend more time in the middle of the block too.
Thanks for the tips. It'd be 11-28 I think, Ultegra 6800. Gonna size down my 60cm CAAD10 to a 58 at the same time.