Old 09-14-08, 03:54 PM
  #2  
HillRider
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Join Date: Aug 2005
Location: Pittsburgh, PA
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Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

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Assuming the rims are 700c and they aren't intended for a 29" MTB, you certainly can run 25's or even 23's. Most bike rims are very tolerant of the tire sizes they weill acccept.
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