That is so interesting, I have been playing with tire pressure up and down for a couple of weeks and to me 38 to 40 psi "felt" the best. Thanks for your input. for a none car guy it is much appreciated.Thank you for the additional information. To maintain the same load carrying capacity as the O.E. tires (at placard pressure), the minimum cold inflation pressure we suggest for your 285/70R-17 DuraTrac tires is 40PSI.