I have a '96 4Runner 4WD running 285/75R16 BFG AT's, load range D. Stock bumpers front and rear. Only additional weight is a Hidden Hitch. 99% of my driving is on-road.

Currently, I have all four corners set at 30 PSI, but if I need to raise/lower the PSI I'd like to do it before any irregular treadwear begins.

Thanks in advance.

 

good question.
I've got 265/75/16 and although I have no idea what Toyota recommends (on the driver's door seal sticker) I have learned to go with the tire's rating over the car's. The tires perform best under load at 65psi cold, but that's a lot of pressure. However I usually cruise at at least 45psi all four corners. It seems to help a little on gas mileage and I've driven about 15k on these bfg t/a ko's and they show no excessive wear in the middle. (too much psi causes excessive middle wear, too low causes excessive wear on the edges). Then again, I rotate my tires every 3000-5000 miles with my oil change so that may be counteracting it.

While we're on the subject, I usually like to air them down to about 15psi in this thick mud around here. They work GREAT in mud aired down!!!

That's just my .02 that I have had success with, I'm sure you'll get more input from others.

 

Well, I'm running mine at 32.5 PSI all four corners when on the road.

No irregular wear for me.

Hope this helps.
G

 

I have run mine at 30 PSI on all corners for at least five years. No abnormal wear to speak of. They wear like iron.

I drove 200 miles with them at 45 PSI, but only because the tire shop didn't know what pressure to use. I thought my shocks were shot because the ride was so harsh.

 

tire shops know a thing or 2 about tires I think... And they know where to find the vehicle-specific tire pressure rating. It's just a better idea to go with the tire moreso than the car because my truck came with 265/70 goodyear something or another road tires and now I have completely different bfg t/a ko's 265/75 and so there's a huge difference. It may not have a huge impact, but I guess my point is that you can't say tire shops don't know what pressure to use. That's like saying the dentist didn't know how to do the root canal or something. Terrible analogy, but you get my point.

 

The tire shop that put 45 PSI in my tires was a big rig tire shop. Most big rigs run 90+ PSI.

And I don't agree with you on the tire manufacturer knowing more than the vehicle manufacturer as to what pressure to have the tires at. The tire manufacturer doesn't know if the tires are on the front or the back, or what kind of loads the tires might see.

 

I run 35psi on the street. Off road I will usually go down to 20 or 25. 265/75/16's here.

 

I went with what the dealers set mine at the last time I was in the shop which is 32 cold and they seem to be doing fine...the ride seems normal to me.

Fink

 

30-ish psi. I'm not sure how accurate the service station pump is but I normally set it to just above 30 and top them up every 2 months or so. I have heard that tires will loose 2-1/2 psi per month (or something like that)...

 

I just had the BFG AT on my '84 pickup turned around at Les Schwab (when I purchased the truck, the white letters were showing. Don't like that). Anyway, the boys at the shop said to run 30 PSI. Said the 33 X 12.5 tires were alot of tire for that truck, and I didn't need to run more pressure than that.
My 2 cents.

Jim