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Old 06-18-19, 10:45 AM
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ThermionicScott 
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Bikes: 1991 Bianchi Eros, 1964 Armstrong, 1988 Diamondback Ascent, 1988 Bianchi Premio, 1987 Bianchi Sport SX, 1980s Raleigh mixte (hers), All-City Space Horse (hers)

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Originally Posted by AlmostTrick
Yes. The difference may be marginal, but to say there is none is incorrect. Larger sprockets and cogs are more efficient.

https://www.cyclingpowerlab.com/Driv...fficiency.aspx
As much as 1-2 watts at a power level most of us don't ride at, when comparing cog sizes that are at the literal extremes of what is possible on a FG bike (I've never seen a fixed cog bigger than 24T). So it's correct to say that the efficiency difference is down in the noise, for all practical purposes.


I do try to use the biggest chainring and cog combination I can for my gearing, though. Chain wear increases with the angle the chain is forced to bend under load, and I'm pretty sure I can feel the difference in chordal action between a 13T and a 16T.
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Last edited by ThermionicScott; 06-18-19 at 10:49 AM.
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