wallytoo
Member
Mud usually tends to hide obstacles such as tree roots and sticks just waiting to slash your sidewalls, so its best to avoid reducing tire pressures if you can avoid it..
i fully realize this was posted back 11 years ago, but nobody took exception to it, and it is wrong.
sidewalls are more susceptible to being punctured at higher pressure, not lower pressure. where sharp objects are likely to be encountered, run the lowest pressure that you are comfortable running that will maintain the bead. that will vary by tire type, make, and wheel combination (beadlocks/no beadlocks, etc).
this applies to rock surfaces, too, not just mud.
puncture resistance, and sidewall strength are one of the reasons i prefer running bias-ply tires where i wheel (new england). i've got over 20 years experience wheeling, and 15 of that running bias swampers (ltb and "plain"). another advantage is being able to run very low pressures w/out beadlocks. i typically run 2 to 4 psi when wheeling my cj, vs the 7 to 10 psi when running radials on the cj. those numbers would/will be slightly higher for the 4runner, since it weighs more. i think i could get away with 4 to 6 psi for bias, and 8 to 12 with radials.