Thanks Tom, and good point RG about rim being a big factor.
The roadie rims are DT Swiss, 700C, 28 spokes, and I'm pretty sure they are the RR 1.1 model.
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http://www.youngwheels.com/prices_rims-spokes.html >
How would this rim impact the fork-clearance of 27mm & 28mm tires? For example, what would be the expected width of the 27mm Rolly Poly or 27mm Ruffy Tuffy ... on the RR 1.1 rims?