I have BFG's Mudterrain T/A' KM2s. When I got them they were filled to 65 PSI. I wondered why everything was bumpy during my DD driving. After reading the Jeep Forum (do a search for tire pressure), you will find just about everyone has brought them to around 32PSI for DD and around 18PSI when airing down off-road. One guy on the forum has the exact tires I have and said he has had them at 32PSI and got 50,000 miles out of them. I took his advise, aired down to 32 for normal DD driving. What a difference. Much smoother ride.