[sweetk30]

my old k30 with 36" or 38" swamper bias ply is use to run 25psi for best ride and tire wear .

they were 16.5 rim size also .

try the tire chalk test on the tires to help pin point the best psi for any tire on any vehicle . old school trick for finding out pressure .

tire chalk crayon across the tread sidewall to sidewall tread area only .

stright line 1/4-1/3 mile start and stop no turning .

you want even center wear off of chalk with 1/3 almost untouched on outside edges . if just heavy center gone to much air . if center left and outside edges gone or heavy wear its to low air.

did this on mine and 2-3 test drives got me at the 25psi .