Hello, I just got a set of 26" terra tires for my max 4, what is a good psi to run these at? Do you change psi for swimming? I've been wanting a set of these for awhile, we have Goodyear terra tires on one of our monster trucks(these were discontinued 18yrs ago) found 8 new ones in a warehouse. Our Goodyears are going to get hard to find..... Overall are these good riding tires?