Recently I got 25' tires for my touring bike. I like them because the they support up to 120 psi quite a different riding experience. However, I have had flats after flats. My front tires keps getting flat again even though I change the tube. I inspected my tire very carefully. I did find a little glass shaft stuck in the tire but what caused the flat is the wheel. It turns out that when the tire is inflacted that to 120psi (which is ok according to the tire), the tube gets dammage by the spoke nipples (I think that's how they are called) on the rim. Even though these are protected by some rubber stuff. I noticed my rear tire is not much better (I went down from 120 to 40psi overnight and I noticed the same marks on the tire).
I moved back to my earlier tires in the meantime but does anybody have advice on this. Is it too much pressure full stop?