Yep, KM1s require to run them at 44+ psi to reduce the wear and noise. I have done a chalk test to see what is the optimal pressure and for my WJ it is 44-46 psi. When I got my KM1s from one of the offroaders here (sorry forgot the name, but got a great deal on a set of tires) they were pumped at 50 psi. At 30 psi these tires are already pretty soft to do some offraoding