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Old 08-29-10, 08:23 PM
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Big chain ring question

I have a 52 tooth chain ring and wondering about putting a 53 tooth chain ring on instead. I ran the numbers on https://home.earthlink.net/~mike.sherman/shift.html. The truth is in the end I'm not sure how to interept the numbers. How much difference is there.


Cog is 12 -25 with 700 x 23 tires

This is cross posted in the clydes forum. I posted it there to see if there might be a difference for a clyde who has more "push" then the small riders.
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Old 08-29-10, 08:32 PM
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its a RCH higher. why does it matter? you cannot pedal downhill fast enough? 4.33 :1 is not high enough?
losing the finish line 40 mph sprints?

another ratio math calculator .. https://sheldonbrown.com/gears/ .. to plug in the numbers ..
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Old 08-29-10, 08:38 PM
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It's less than a 2% difference - hardly noticeable.
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Old 08-29-10, 08:46 PM
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changing the rear cog to an 11-25 would have a bigger impact.
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Old 08-29-10, 08:50 PM
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Originally Posted by cyclist2000
changing the rear cog to an 11-25 would have a bigger impact.
Thanks that was my other consideration.
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Old 08-29-10, 09:06 PM
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I found a 11t cog for HG 70 cassette, will this work on a HG 50 cassette? https://www.amazon.com/Shimano-HG-70-...137884&sr=1-27

Last edited by dbikingman; 08-29-10 at 09:14 PM.
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