Tire Pressure

Hi everyone, I’m on the road and I don’t have my manual what should my tire pressure be??

We had a 40° drop in temperature last night in Atlanta. It was 75° yesterday and got down to 35 at night. Could that have caused this?

Looks like I’m getting an error and I’m hoping that’s what’s going on here. Thanks.

 

Tire pressures are listed in the drivers side door jamb.

 

did not know that, thanks

 

Mine dropped from 34 to 30 or so the other day. We had a 30* swing in temp.

 

And yes. That's what caused your problem.

 

Good to know and thanks.

 

For every 10 degrees of temperature drop, tires will drop 1-2 pounds of pressure

 

I run 2 psi over placard F/R for this very reason.

Dan

 

I wanted to overfill so I’m glad you said that I wasn’t sure if you could go over or not and still be safe

 

your tire sidewall have the max tire pressure you could put.

 

They are but the recommended pressures are way too low IMO. On my stock 275 Dueler H/L's if I run that low of a pressure they wear unevenly. I think Toyota recommends that low pressure for ride quality.

I personally run 36 all the way around cold. You have to adjust this as the temps change from 90 to 60, etc.

And yes, temperatures play a big chance on tire psi.

 

According to my door jam, Toyota is saying to run two different pressures front and rear (30 and 33... i think)

 

Just remember that's the maximum internal pressure the tire can contain and the pressure increases while driving. Never inflate the tires to that pressure (or anywhere close).

 

Good point and I run 35 psi front and back in my Michelin Defenders too. I assume the TPMS uses the recommended pressures as the guage for when the warning lights come on.

 

I ran F32 R36 because I always have tool on bed. Truck usually run a few psi more on the back for load

 

I never go off the recommended pressures. Unless I'm hauling or towing, I always run more in the fronts than the rears so as to not "buzz" the edges off the fronts. All the weight on an unloaded truck is under the engine and tires are expensive! I have Nitto Ridge Grappler load range E's with a max PSI of 80. I run 44 in the front and 38 in the rear. Yeah, I'm sure a give up some ride quality, but probably slightly better mileage and longer tire life. One caveat, if you over inflate, you'll wear out the center of the tires. You need to monitor for a while to find the right pressures for your vehicle.

 

While I agree there is no need to run at max pressure unless it is a trailer tire, the max pressure rating is a cold rating meaning you can fill to the max pressure cold and then run the tires.

 

I emailed Nitto and they recommended 38 F and 41 R for Ridge Grapplers on a Tundra Crew Max.

 

My recommendation....watch your tire wear. If you start buzzing the edges on the fronts, increase pressure. If you are wearing in the middle of the tire, lower pressure. 44F, 38R works for me when I'm not hauling or towing. Will increase rear when loaded.

 

I run F65, R60 when empty in bed...tires are Cooper Defenders and the max is 80-81psi...we have tons of snow and ice and I have no issues with traction, cupping, or uneven wear; though I do have 600lbs of tube sand in bed...

 

Will that be the same tire pressure for 35s?

 

Nope, 35s are not factory spec'd

 

No. That is for the stock tire size listed in the door jamb.

 

I noticed your front pressures are higher than your rear pressures. Were they like that before you got the warning lights? If not, you may have issues with the rear tires losing air due to something other than temperature change.

 

That is correct. IMO, the lower threshold of the TPMS system is too close to the placard pressures. It only takes being a pound or two below placard before the warning lights come on.

It would be a lot smarter if they had a temperature compensation algorithm that would not trigger a warning if outside temps got low enough to lower pressures below threshold. To compensate, I run 2 psi over placard (32F/35R) and this works fine.

Da

 

yep, it was like that before. truck is new only 7,200 miles