What psi should i run?

The “tire pressure.com” version reads a chart, and doesn’t interpolate. The “tire-size” one does a calculation to interpolate and produces a more accurate answer.

Remember to check if your original tires are “P-metric” or non-P. It’s on your door jamb.

 

Weight per tire will lower your mpg’s. Higher the rating usually is heavier tire. More ply means more ridgid sidewall which is huge in determining the handling characteristics on the road. I had these whimpy 2 ply Duratracs on my last truck (Canton AT4) they all were smitten with and they had atrocious roll to them and sucked in the rain (the genius idea to put an auto locking rear diff on that model didn’t help) and I would regularly break loose the rear on sharp turns mildly accelerating. I think some truck companies try to accommodate or even lure people to their rigs by putting on an AT tire but they don’t always hit the mark. The GY Territory AT’s that came on my taco are far superior to the Duratracs being a smoother ride and more ply sidewall they can handle turns without too much roll and wet traction is good. They’re a solid choice for all around driving. Those Michelin LTX defenders are one of the best truck tires out there. They are based more for highway driving but have all others beat in the wet, snowy, icy conditions. Lots of very loyal owners use them exclusively on all their rigs. I think going up to an LT tire will feel good and have a solid feel but really not needed in these small trucks. They are heavy. To the point of 10 plus pounds more per tire. The BFG KO2 that everyone likes to throw on their rig is a 60 lb 10 ply beast and one of the best AT tires out there. As per my next set I’m going with the Toyo AT3 which make a 4 ply XL rated tire and a heavier 8 ply E rated tire. The XL option for the small trucks is plenty and they have superior wet traction for my Western WA roads. They have 3 peak snow rating too. Another way to get better wear is siping. Siping can give you great wear and traction. As far as PSI I was always told to first start with the vehicles recommended pressure and don’t go above or below 5 pounds either way as long as it doesn’t exceed the max cold pressure of the tires

 

265/75r16 I run cold at 30 in the back and 32 in the front to account for front end weight. Front never gets over 34/35psi, warm.
I think it all depends on where/how you drive.
I can't see running no 80psi like my tire recommends. At least not for anything that I do. Might chip a tailbone.
Rock climbers run them real low like 14psi range.

 

The "80 psi" on your tire is a "maximum allowable," not a "recommendation."

Unless you are doing something very odd with your truck, use this to decide on the normal cold temperature pressure you set your tires at.

 

Ya. Poor choice of wording on my part but you catch my drift. That's a lot of F'n pressure.

 

I'm running Yokohama G056's, stock tire size, great tire if we didn't have any snow here. Lousy when there is snow or ice on the ground unless I put it in 4wd, so may be a factor of being a truck with a light rear end and not so much the tire. I've always kept tire pressures on all of my vehicles between 30-32 psi and have always had even tire wear.

It drives me nuts when technicians crank the tire pressure up to 40-44 psi when you take your vehicle in for service.

 

I am running Nittos ridge grapplers on 265/70R16 and been running them at 38 psi. I am wondering if anyone is running stock like myself and what psi is working best for you or if I need to do the chalk test.

 

New to trucks and just got my 2016 Tacoma SR5
it came with brand new BFGoodrich Advantage T/A Sport LT
do these qualify as LT tires that need more pressure?
how can i tell if its actually p rated?

Stock size is 245/75/16 and call for 32psi all around
new tire is also 245/75/16 T load rating 111

The dealer inflated to 32 all around
based on these threads though, it seems not only should i have higher pressure in the first place
but i might need even higher because of the new tire style just to match the placard psi equivalent


suggestions / recommendations welcomed

Thank You

 

Scroll up about 4 posts and use the link to the pressure calculator.

 

The tire name is needlessly confusing.

T is the speed rating, 111 is the load rating. It's a standard load tire, 32psi is perfect.

If you ever think a tire is E or LT rated, look at the tire size, it should start with LT245/75R16

Next the max psi on the tire will say 80psi, whereas your tire is 44psi max.

 

thanks for the explanation on verifying LT tire
80 vs 44 is a good one to look at
also very confusing that the manufacturer would include LT in the tire title

would you recommend a slightly higher psi for better MPG(L/100KM)
from what I have seen ~10% would be good and that would be ~35PSI

while 35 seems the most common (when car calls for 32)
I am seeing people use between 33-38

 

32 cold warms up to about 35psi or more during the day and highway driving.

If you start at 38psi you can actually go over the 44psi max depending on temperature swings.

I’d say only go higher if you’re towing or hauling.

35 cold is as high as I’d go normally.

 

Thank you sir
I will try 33-34 and monitor how high it goes @ hot
I will try to find a value that does not pass 38 @ hot

 

E rated tires require more pressure than SL tires for a given load. It is counter-intuitive, I know, but it is true. Stock tires are SL. The calculator shown above is pretty accurate if you enter the tire's load rating correctly. You can also go to the tire's manufacturers website. Often they will have a load/pressure chart for each tire and size. If you use the load max indicated on the door jam placard for the oem tires and check the chart for the same load - you will get the 'proper' tire pressure for the tires you are running.

 

Can you kindly provide the LT metric load formula? I cannot find any tables that give you load capacity under 35 PSI, and I don't think the weight per PSI moves linearly, so if you had the underlying formulae I would appreciate it! (Trying to see load carrying capacity of LT275/70/118 125 load at 30-34 PSI -- at 35PSI it's 2,070 pounds, but I cannot find anything about what's below that)

 

I run my 295/70/17's at 38. When I drive on the freeway to a campsite fully loaded, I'll bump it up to 40 in the front, 42 in the rear. On the trails i'll drop it down to 22.

 

That's because you aren't supposed to run LT tires at under 35 psi.

 

I think that’s right. That said, 1-2 psi below will likely be fine, but wanted to calculate the actual load before I messed around with it.

 

I run 35

 

Sorry for the late reply.
I rarely come by TW anymore...

You're right...the charts suggest it doesn't follow a linear slope.

I extrapolate a value from the lowest psi range available. Caveat emptor...