Tire psi question

Steve2003 · Post by **Steve2003** » Fri Apr 15, 2005 5:59 pm

I've never had all terrain tires on any vehicle i've ever owned. I was looking at my tires yesterday, and they seemed kind of low. So I checked them and they were all like 5-10 psi different. My tires dont recommend a certain psi but they do say up to 50 psi. What psi do any of you guys recommend? My truck is a daily driverand its starting to get warm here in SoCal. Its getting into the 80s here and pretty soon its going to be getting into the 90s and 100s. I would appriciate any of your guys opinions.

Thanks, Steve

Yellow Hammer · Post by **Yellow Hammer** » Fri Apr 15, 2005 11:44 pm

I run my BFG ATs at 35psi. I do a lot of traveling for work and when I go somewhere, I pump them up to 40psi. It rides a little rougher but on the interstate it's not that bad.

jeff024 · Post by **jeff024** » Sat Apr 16, 2005 1:53 am

my tires also state 50 steve I ran them for awhile at about 35 but have gone up to about 42.Just dont forget if you start with 50psi and its 90-100 outside those tires are gonna build more pressure when they get hotter.

Steve2003 · Post by **Steve2003** » Sat Apr 16, 2005 6:19 am

Thanks, Yellow Hammer and jeff024.

My son who works at the wal-mart tire&lube centre told me 40 psi. So thats where I had put them. I just had to double check because he gets some off the wall ideas sometimes

He's only 18

Steve

adrenalnjunky · Post by **adrenalnjunky** » Sat Apr 16, 2005 7:05 am

Chesked the pressures in my BFG AT's yesterday - ran them back up to 40 - they were all at about 34.

Even at 40 they look like they're a little low, but like Yellos said - you can feel the difference in the ride quality.

I have heard that the Revos can run up into the mid 40's and still ride pretty nice. I think my dad used to run about 45psi in his Z71's revos.

killian96ss · Post by **killian96ss** » Sat Apr 16, 2005 7:45 am

I run 36 psi in front and 32 psi in the rear with my 31" MT/R's. I have tried 40 psi, but it feels like I'm riding on solid rubber wheels.

As long as you don't exceed the maximum psi rating on your tire you will be ok. My tires are 50 psi max. Another benefit to higher tire pressures is better gas mileage. Always make sure you adjust you tire pressure in the morning, or when they are cold.

Steve

Retep · Post by **Retep** » Mon Apr 25, 2005 8:29 am

I keep my Revo's set at 37 front and 35 rear cold PSI. With heat of the day ambient temperatures and warm up from driving, they will get into the 40+ psi range.

Note: I put some new nitrogen inflated BFG Traction T/A's on the Grand Prix. They don't get the differences in psi due to driving or changes in outside temperature.

barch97 · Post by **barch97** » Mon Apr 25, 2005 8:45 am

I had seen somewhere a while back where you could adjust for "ideal" tire pressure by drawing a thick chalk line across the tread of the tire. Then drive a short distance (a block or two) and check the wear of the chalk line. (preferably in a straight line as turning will effect result.) If it's worn off completely in the center and still plainly visible toward the outer edges, you've got too much pressure. If it's worn on edges but not as much in center, you've got too little.

I've never tried this but it seems to make sense.

I more comonly check the pressure by quickly turning side to side at highway speed. If it's soft and mushy or any loss of control... they're too soft.

barch97 · Post by **barch97** » Mon Apr 25, 2005 8:53 am

the Tire Tech Advisor at tirerack.com says to use recommended pressure from vehicle owners manual regardless of tire. (it's the air that supports your vehicle not the tire).

barch97 · Post by **barch97** » Mon Apr 25, 2005 9:05 am

While this article doesn't talk specifically about our trucks or AT tires, it does have some great general information and explains how to calculate the best air pressure for your tires based on vehicle weight and suspension.

a2b · Post by **a2b** » Mon Apr 25, 2005 9:42 am

tire pressure has to do with the weight of the vehicle, wheel size, tire size and tire build and then, your own preference.

a passenger tire will need more air on your truck, but a bfg at will not because of the thicker walls.

for example. i run 2 to 3 psi with my sx's while others with the same vehicle, wheel, and tire size are running 8 psi in their mtr's.

your s-10 is light in the back, no need to run alot of psi back there. i used to run my bfg at's at 30 in the front and 25 in the rear.

also, the truck has more traction at lower psi, but it will turn and get better gas mileage at a higher psi, but ride like crap