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Old 03-11-12, 10:21 PM
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Bill Kapaun
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Originally Posted by jsdavis
If anything, narrower tires have more rolling resistance.

To answer your question though, according to Sheldon Brown's site, your 15mm rims can handle 23-32mm tires.
http://sheldonbrown.com/tire-sizing.html#width
That's why they use those "fatties" on the Tour d' France etc.

To the OP-
You can pretty much use as skinny as you want. (20c)
I use 26C's on a 20mm rim with absolutely no problem.
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