I struggled 28mm tyres on my 2013 Giant TCR - more at the rear because of the brake arch clearance due to the height of the tyre.
The front was less of a problem.
Also, getting the wheels on and off was a mission because the brake calipers didn't actually open wide enough. This made me think that my bike was old and wasn't designed with these fat tyres in mind.
Shimano did have a tall version of their caliper brakes:
I don't understand how those would have helped as the mounting bolt on the frame dictates where the brake arch sits.
Or, maybe they just opened wider.