Cool, I rode a non disc caad12 today, again in 54. It's deffo too big. 52 will be a much better option. Hope the store can swap it out... They're chasing a 52 from another shop but not 100%.
The test bike today had 25mm Vittoria corsas on. Ride quality was very nice. 28s should be perfect.
I just run >80psi which seems to solve the harsh road vibes