Others in this forum have stated the "optimal" pressure for a TJ on 31s is 26 psi. I used to run 25 psi on the street, but lately I've bumped it slightly to 26-27 psi. (When I'm off the pavement, I typically drop to 15 psi or less depending on the terrain.)
While the tires can handle it, I'd say 32+ psi is too high for a 31" tire on a TJ (unless you're towing or fully laden).
__________________ Dempsey Bowling
My fleet: 91 Miata, 98 Wrangler Sport, 06 Mustang GT, 01 Suburban 8.1L, 14 Forte EX
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
Yeah just checked the Tj forum for tire pressure on 33's and their running them at 25-28 with 34 on the highway. I'd agree with Sherpa. Gonna let mine down to 25 tonight and see how she handles. Probably make for a softer ride than I'm used to.
Keep ya posted
Generally speaking, the bigger the tire the lower the air pressure it requires to support any given vehicle. 29-30 is about right for a 31x10.50. Lower pressure for a lightly loaded Jeep, slightly higher for a more loaded Jeep.
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