Originally Posted by
Bluechip
My CAAD9 is currently running Farsports 58x28 rims with Conti GP4 25mm measuring at just under 30mm. No clearance issues with this setup at all.
I have 700x25c Michelin Pro 4 Endurance tires on mine, but they measure 28.8mm with the rims I am using (DT Swiss PR1600 Spline 32). That's with a digital calipers. I come a bit close to the front derailleur, but easily still have 4mm.
I was recently riding with a friend who had some Bontrager 25's on his Domane road bike, and my Michelins looked absolutely monstrous next to his, even though they were nominally the "same size".