What capacity are they? my nittos are LT265/75R16 E and have a load capacity of 3415 lbs @ 80psi . And the 285/60R18 have a capacity of 3086lbs @ 50psi . I do not think the geolanders are rated higher than that. I ran my last set at 45 psi. my new set a little lower at 40 psi . As the rears had a little extra wear in the middle which would mean too much pressure causing uneven wear. You may be able to find out from Yokohama what psi they would recommend. shawn