I have the Toyo tires, but they are only the 33" tires. I had been running 35-40psi and they were okay. My front end is kind of bad, so the tires were cupping a bit, but I've been rotating them regularly. With the 10ply sidewall, you can tend to run lower air pressures and still be fine. They are a hard tire, so they will ride rougher than some others. They are definitely better than your old BFG's.