Running Gatorskins, 25s on my ‘12 CAAD 10 for 4 years now. Had tried the GP4000 SII but to many sidewall gravel cuts on the crappy road paving around here. I get very few flats on the ‘Skins, and never felt that their ride was harsh or unstable in cornering. If you don’t have poorly maintained roads the ride of the GP 4000 S II is fantastic, and I recommend the 25s. They are probably as wide a tire as the CAAD will accept for the ‘14 models.