80 psi isn't exactly high pressure for road bikes, though it seems to be a common pressure for many on road bikes, depending on tire width. Some road bike tires do have a low max pressure.
Newish tire and folding tire? Check what
tcs was asking. If this is a smooth bead rim with no hooks, then most foldable tires won't work well on it. Though I think I did run one on mine, but I do a lot of not so bright things and get away with them.
I have had tires blow off a smooth bead rim. It's quite impressive noise and no evidence of damage other than a blown tube and partially dismounted tire.
You know what witness lines on a tire are and how to use them?