my buddy got almost 40k out of his bfg mud terrains and they still have 10k left in them. There's no reason why your a/t's should get that bad of wear. He's already got 10k on his new bfg at's adn they still look brand new.I bought a set of BFG All-Terrains a while back from Discount Tire and they put 40 in all 4. I rotated those tires regularly and they only lasted me 10,551 miles.. My current set of BFG's I'm running with 35 and they are having the same problem. I think that was because I had a 5 1/2" blocks in the rear and I wasn't getting traction, but I don't know. We'll hope that the blocks were the reason that my tires were wearing down so quickly. But if I were you I'd run between 35-40..
By the way, what exactly is the chalk test?
id say they are pretty darn close to 33" new.jimmy what do those measure out to exactly mounted up? im thinking that size for my moms HD with either the cognito leveling kit or the new 4-6" kit set at 4, my dad and i are still undecided
Dear James P,
The recommended air pressure for your 1999 Chevy K1500 with Nitto Terra Grapplers size LT325/60R18 D is 40 psi (cold) for all 4 tires. We thank you for choosing Nitto Tires.
Nitto Technical Department
You just rub chalk across your tires, drive a short distance, then check to see where chalk is left. If there is still chalk remaining on the edges, then you need to air up some more.For shits & giggles learn me on this chalk test.