Yeah, if you're like me with short 35 series sidewalls you want to max out your tire pressures to what the tire is rated at when on public roads so that if you hit a pothole you don't bend a rim. Always stick to tire manufacturer's maximums and double check the pressures when the bed is loaded since it will increase tire pressure. Max pressure for best fuel mileage, lowest pressure for racing only. I always worry about spinning a tire off the rim when at the track since I air down to 10 lbs. Oh well, money grows on trees, huh.