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22 November, 10:41

What will happen to the efficiency of a bike after the gears have been cleaned and the chain has been oiled?

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  1. 22 November, 10:55
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    Well, figures for efficiency vary a lot, but according to Bicycling Science it's lubrication that matters most - lubing a dry chain can add 5% to the efficiency.

    More interestingly (and I hadn't read this bit in the book before) it varys a lot depending on gear ratio - bottom gear (22-28) is 99% efficient, top gear (42-11) is 88%. That's a big difference
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