So I purchased Rockcrawlers and A/T BFG's and checked the PSI today... 60 PSI cold on all 4 ...lucky to be alive after these 100+ degree days! Who in gods name would inflate to 60?!?!

 

what about the ratings that they give you on the tire?

 

either of those tires could have a D or even an E load range, and if they do then 60 PSI is normal.

 

My '85 SR5 is showing some wear on the outside of the front tires.

Toe-in is correct. And it handles fine. Tires are Bridgestone DD's. Truck info on door says 26 front, 35 rear. I've run 32 front / 36 rear for ever.

Tires have a lot of miles on them but wear is even with lots of tread left front and rear, except for the outside wear on the front.

I've never rotated the tires. Stopped doing that years ago when I first started running radials. Clearly in this case, I'd have prevented this, or at least doubled the miles with the same wear.

My wife drives the vehicle the most, and she is a way-to-slow driver.

So the question is, why the wear? Comments welcome.

 

35 on my Nittos.

 

Because unless those are the exact stock sized tires that came with the truck then the door jamb, manual and factory info is useless.

I am sick and tired of this danged question and people keep on saying they run 35 in a tire designed to run 50psi Nothing against you btw.

Inflate the tire within 5-10lbs less than the maximum pressure. Take a piece of chalk and scribe a line across the tread and drive about 100 feet. Get out and check to see how the chalk wore off.

-If it wore off even the tire is inflated correctly.

-If it wore on the middle of the tread its inflated to much.

-If it wore off on the outside its inflated to little...


Now I am gonna say this one last danged time and hopefully some of you pick it up:
THE DOOR JAMB INFO, MANUAL AND ANYTHING FROM THE FACTORY OR SUCH ABOUT TIRE PRESSURE IS 100% WORTHLESS IF YOUR NOT RUNNING THE SAME EXACT SIZED TIRES THEY HAD ONE WHEN YOU BOUGHT THE THING NEW. YOU MUST DO THE CHALK TEST TO SEE WHERE YOU STAND!

That feels better.

Oh and You either under inflation and have soft ride, the tires wear unevenly and quickly. Over inflation and you wear them unevenly or the correct inflation. A BFG AT in 265/75/16 says 50psi is max pressure, chalk test should yield about 39-42, not 35.

Thats what you go by...

 

20 psi in my 36x 14.5's tsl's
35 in my 31 10.5's les schwab sxt mt's

i almost couldnt read this thread as i am so sick of checking or hearing about air pressure seeing as i do it all day at les schwab

 

Wow. Some of you guys are running crazy high pressures...don't you guys wear out the center treads of your tires? Anyway, mine are set to 25 psi (32x11.50x15 Goodyear MTR). It seems that whether I set them at 25 psi or 32 psi, the mileage doesn't change for me...and at this pressure, I can drive on the road or go off road when needed without deflating/inflating my tires, as I don't have an onboard air supply.

 

29 lbs front and 27 lbs rear runnin Cooper STTs 265/75/16 load range D

 

31x10.50 15 BFG mud terrains = 38 PSI

 

BF long trails (yes they suck) 245/75/r16's and i keep them around 32-35psi..

15-20psi in the sand

 

Maybe I didn't make it clear that I am, in fact, running stock tires.

As to your chalk test, I've got nothing but dirt roads and driveways... but I could do that test if I needed to. The question I have is this: How do you explain the fact that a tire at rest is quite different from a tire traveling at 60-80mph. A good radial will deform (the "patch" is much larger at speed). This, I would think, would mean a chalk test would work only on a more rigid sidewal, such as late model designs, or a non-radial tire. Am I wrong?

I'm thinking my mistake was in not rotating the tires. Although I've never needed to do that on a radial tire. Just swapping them from front to rear would have made a big difference.... guess we live and learn.

 

32/11.50/15 on 15X7 Toyota OEM alloys @25 psi all day every day

 

I have a 05 4Runner with 265/65 r17 tires. The sidewall say 51 psi maximum. What psi should they have when cold?
The have been staying at 32-35 psi. The tires appear to be getting some extra wear and the Air Pressure light stays on in the dash.

Any info would be appreciated.

LowerArcadia

 

I try to stay around 35 PSI, but since my nitto's are 65 PSI Rated, I might go to 50-55 PSI for better gas mileage.

 

I usually run 35 psi in my 32" A/T's. On long road trips, I run on up to about 45-50 psi, for gas mileage. lol.
Offroad if its slick (muddy/wet) I run down about 15-20 psi.

 

I usually run 40 psi for the road. And some where between 25 an 17 off road, depending on how sandy it is.

 

At 50+ psi your Nittos will wear very poor and handling will be sacrificed and is kinda dangerous when recommended pressures are around 32psi.

I run my Nittos at 35psi with no ill wearing and handling is still quite good. I gert what nearly every other 4Runner gets and even with my being a bit of a leadfoot I still get about 17mpg in the city,that number has jumped to almost 21mpg on hwy trips.

 

I run 18-20 PSI on the road, but that is because I have a 13.5" Bias tire on a 8" rim.

 

35 PSI on the street. 305/70R16 BFG Mud Terrain KM's on OEM 16x7's.

Run them any lower than 30 and they get pretty squirly on the street.