The Krylions kick ass. My coach insisted I switch after three flats with Ultra Gatorskins. I've never flatted or looked back since! I have no trouble installing 700x23 in the Krylions for what it is worth.
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Brian
Cervelo Dual/Calfee Tetra Pro/Kestrel 200sc/Specialized Sirrus/Diamondback Ascent/Centurion Fixie