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@Colin_the_Bald
I'm a Physics failure, but maybe we should just sneak a look at the British Cycling machines and presume that in their pursuit of marginal gains they might have got it right. Then deduct several gear inches on the basis that they're really very good/strong/terrifying and we're a bit shite by comparison....
Suggestions for a fixed ratio for Alpe d'Huez please, I've drunk too much wine and this idea has occurred.... 39/25 has been kind to me in the past on a road bike, but should I go higher or lower on fixed?