Ideal pressure

I know every body runs different pressures , I would like to hear what you guys think the ideal pressure for the nitto grapplers in 285 70 17 road compared to dirt.

 

Chalk test is the best way to get the pressure right for on-road driving. Like you said everyone's going to be little different depending on their setup.

 

x2- Each different manufacturing run or tires, size, environmentals, truck, and personal preference make anything anyone tells you here a guess. The chalk line test will give you a "perfect" number for balanced wear on your rubbers- and then you can adjust from there...

 

Dont know the chalk line test , please enlighten me.

 

http://www.tacomaworld.com/forum/wheels-tires/51690-what-psi-should-i-run.html#post921497

 

Draw a line straight across the tire with chaulk and drive for a short distance. Inspect the line, if it's worn evenly off the tire, you're at the right pressure. If it's only worn in the middle of the tread, you have too much pressure in your tires and the opposite if it's worn only at the outside.