Tire Pressure Question

I have Yokohama Geolander A/T-S in size 265/75 R16. I'm wondering what pressure these should be inflated to since the truck didn't originally come with them and doesn't match any of the 3 sizes on the door sticker. Should I just use the chalk method and see what that gets me? Currently there at 30.5psi each and that's from the Toyota dealership.

Thanks

 

I have 285/70/R17 Pro Comp Xtreme Mud Terrains...A Mech told me to run them at a higher PSI becuase of the softer rubber compound if I want them to last...so right now I have them set at 40 psi...

 

yes, use the chalk method.

 

I try to keep my 285/75/16 Nitto TG's at 40 psi as well.

 

Search for "chalk line test" the psi varies from place to place do to weather, road conditions, etc. Two people with the same exact tires could be running two very different psi.

 

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

 

Going with the chalk test and I'll post results for reference.