Join Date: May 2009
Bikes: Trek 2.3, Trek FX-7.3
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I agree that the real issue will be the wheels. The paired spoke wheels that come stock on that bike will not hold up to 250lb+ riders.
I have custom 36 spoke wheels on mine, and I run 28 mm tires. The primary reason I bought the Trek instead of the Specialized Allez Elite is the larger fork/brake clearances allow for the fatter tires.
The most important thing about the wheels is probably not the rims themselves but the spokes (how many and how well tensioned).