5-7 psi, yahoo, my kind-a pressure. I've done that in the Jeeps, but only when I know we're headed to very soft sand. And even then, there's NO hot rodding around. It's just a matter of getting from point A to point B without getting stuck. It's worked every time. But, 5-7 on the T-dub, wow, I'm gonna have to try that. I'm still gonna start snooping the I-net for new skins though since these are 12 years old.