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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 06-04-09, 06:06 PM   #1
melodymurder
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Gear Inches

i am planning on converting my Raleigh Marathon to a single speed and have been reading up on gear ratio's. anyway i want to be cheap about it and use one of my existing chain rings and just take the other one off. i have a 52 tooth and 40 tooth on right now. i know i want about a 77ish GI which i can get with either 40/14 or 52/18. is their a difference and if so what is it and which should i go with?

Thanks.
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Old 06-04-09, 06:09 PM   #2
skinnyland
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52/18 gives you more teeth overall, so your drivetrain wears less.
Coincidentally, that's what I ride. It's verra nice.
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Old 06-04-09, 06:12 PM   #3
melodymurder
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that makes since
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Old 06-04-09, 06:14 PM   #4
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A bigger chainring offers more flexibility when chosing cogs; run the 52.
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Old 06-05-09, 10:01 AM   #5
melodymurder
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doin it
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Old 06-05-09, 10:04 AM   #6
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There was a discussion about this earlier ... if you wanted to run about that many gear inches, why not go with a 17t cog to get more skid patches?
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Old 06-06-09, 06:58 AM   #7
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Quote:
Originally Posted by devilshaircut View Post
There was a discussion about this earlier ... if you wanted to run about that many gear inches, why not go with a 17t cog to get more skid patches?
its single speed not fixed. he doesnt really need the skid patches since he will be using brakes
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