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Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

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Old 10-18-06, 12:18 PM   #1
Portland, OR
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Suggestions for SS gearing?

Hey all,

I'm converting an old "clunker" MTB as a single-speed CX/hoopty bike.

Any suggestions for where i should start the gearing? 39x17?

39x17 is something that i can manage on my road bike pretty easily. What about off-road/CX?

Thanks for any tips.
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Old 10-18-06, 12:41 PM   #2
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i rode 39x20 at hillsboro accidentally, I intended 39x18 but put the wrong wheels on the bike at home. I have ridden 39x19 at all the previous pdx races. I think its better to be undergeared than over geared. At the end of the race you will be faster, i think.

I would say 17 is stiff---but ofcourse it depends on your strength, I know its not unheard of for guys to run 39x17, im just not that strong.
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