What tire pressure are you running your e rated tires at for daily driving?

[Tray]

I know they have a max pressure of 80 psi, but even 60 seems really high for south Texas, 1/2 ton truck that not pulling or really carrying a load around town. Maybe this has already been covered. Just bumped mine up to 45 from 40. A little background information would be helpful too for context.

Tire Pressure: 45 psi
Vehicle: ‘05 F-150 screw (typically unloaded daily driver)
Location: south Texas

 

[Billiebob]

Go to the tire manufacturers website.
They will give you the acceptable range which will not void yer warranty.

 

[Tray]

Go to the tire manufacturers website.
They will give you the acceptable range which will not void yer warranty.

Warranty is a non issue for me. Manufacturer recommends 40psi which is half of the max...I don’t know maybe that’s best.

 

[bmwguru]

Warranty is a non issue for me. Manufacturer recommends 40psi which is half of the max...I don’t know maybe that’s best.

I run 40psi on the street. It rides a bit harsh on certain bumps but is tolerable overall. I only run that high in order to maximize my MPG. If I didn't have to buy my own fuel I would run 32psi or so. I run 275/70/17 E rated KO2's on my 2006 4Runner which prob weighs less than your F150.

 

[Tray]

Thanks for the feed back.

 

[bmwguru]

Thanks for the feed back.

My experience with trucks in general is if they are unloaded they ride rough no matter what. They are designed to be driven with a load in the bed otherwise they will be oversprung and ride rough IMHO.

 

[Tray]

My experience with trucks in general is if they are unloaded they ride rough no matter what. They are designed to be driven with a load in the bed otherwise they will be oversprung and ride rough IMHO.

I agree, which is why I may be dropping back down to 40, just a little more forgiving.

 

[Boostpowered]

I run mine between 40 and 50 on the road and drop them down to 15 on the trail. 40 is a pretty soft ride 50 is alot stiffer on the pavement when towing i run up to 65 anything lower and the truck sways under load

 

[KonzaLander]

5,800lb Land Cruiser
LT 255/85R16 E Cooper ST Maxx tires
36psi

Nice comfortable ride on pavement with even tread wear. I don't tow more than an occasional small utility trailer.

 

[MidOH]

Brand new box stock (sniff) '17 F250 XL CC FX4

60/45. 245/75R17

 

[Tray]

5,800lb Land Cruiser
LT 255/85R16 E Cooper ST Maxx tires
36psi

Nice comfortable ride on pavement with even tread wear. I don't tow more than an occasional small utility trailer.

I’m running LT 275/70R18 E ST Maxx also, on both my work and personal rigs. Good tires, I did slice a sidewall in the Ozarks a few weeks ago, but it was only losing pressure when the weight of the rig was over the cut.

 

[MMc]

Do the Chalk test It will help you get the most out your tires.

 

[RoarinRow]

I have a stupid question - if you're supposed to check your tires when they are cold, i.e. 3 hours without being driven or at least less than a mile, then how do you know you're not over-inflating your tire when you're done with 4 wheel driving and getting back on the highway? So you might be putting air pressure back in at say 50psi, but because your tires are still hot, you're actually putting 75psi as an example. Does putting in air work that way in higher temp or when tires are not cold?

 

[Tray]

Do the Chalk test It will help you get the most out your tires.

Great idea, thanks!

 

[Tray]

I have a stupid question - if you're supposed to check your tires when they are cold, i.e. 3 hours without being driven or at least less than a mile, then how do you know you're not over-inflating your tire when you're done with 4 wheel driving and getting back on the highway? So you might be putting air pressure back in at say 50psi, but because your tires are still hot, you're actually putting 75psi as an example. Does putting in air work that way in higher temp or when tires are not cold?

I do not know, great question.

 

[RoarinRow]

I do not know, great question.

Thanks it came to mind since I got new tires recently and want to air them up properly. Then of course thinking about overlanding, I was like hmmm but what if...

 

[bmwguru]

I have a stupid question - if you're supposed to check your tires when they are cold, i.e. 3 hours without being driven or at least less than a mile, then how do you know you're not over-inflating your tire when you're done with 4 wheel driving and getting back on the highway? So you might be putting air pressure back in at say 50psi, but because your tires are still hot, you're actually putting 75psi as an example. Does putting in air work that way in higher temp or when tires are not cold?

The cold reference to tire pressures is in respect to ambient temp. That being said if your tires are already hot from trail use and you air them up to hit the highway the tires should in theory stay heated up and the pressure should not change too much...I think. I would imagine you would have a bigger difference if you aired up hot tires to a certain psi and then did not drive them and checked the pressure three hours later...once again I think.

 

[RoarinRow]

The cold reference to tire pressures is in respect to ambient temp. That being said if your tires are already hot from trail use and you air them up to hit the highway the tires should in theory stay heated up and the pressure should not change too much...I think. I would imagine you would have a bigger difference if you aired up hot tires to a certain psi and then did not drive them and checked the pressure three hours later...once again I think.

So I guess if you took a mental note of what they were right before you air'd down, then air up to about that same pressure afterwards, being consistent, then I would also think we'd be ok. Thanks guys just a thought I wanted to run by somebody.

 

[bmwguru]

So I guess if you took a mental note of what they were right before you air'd down, then air up to about that same pressure afterwards, being consistent, then I would also think we'd be ok. Thanks guys just a thought I wanted to run by somebody.

I actually don't think it's that deep honestly. No insult intended. I just think if you air down when you get to the trail and air back up when you are done it should be fine. Just air up to what you want and check them after 10-15 miles of highway use if you are concerned. Does your rig have tire pressure monitor? If so it makes this issue much easier to check. If you were to air up and then drive a short distance to a hotel or such and stayed for the night then I would for sure check your tire pressures before leaving the next morning.

 

[MetalMatt1776]

There is no way to give you the best tire pressure for your rig. The best way to find out though is the chalk test. Mark a decent sized strip across your tread and drive half a mile. Check it, if the center is more rubbed off then you are overinflated. If the edges show more wear you are under inflated. Once you have about even wear you have found the perfect psi. You can normally get it very close to ideal within 2-3 attempts.