Thread: Big Gears
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Old 06-26-17, 02:53 PM
  #6  
jsk
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I think some people are also using the larger chainrings to be able to run a larger cog for the same total gear inches. This is done for drivetrain efficiency, because the smaller rear cog will put more friction on the chain. Not sure exactly how much difference this makes but at the top end of the sport where fractions of a percent can be the difference between winning or losing, it's just one more "marginal gain" to take into consideration.
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