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E rated tires psi

Jgarrison31

By Jgarrison31
in Modifications & Accessories

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tnchevy Senior Enthusiast

tnchevy

Posted
Posted

There is no reason to run the air pressure that high when it's empty; it only makes for a harsh ride. An E-load tire at a lower pressure can take the same load as an LT tire at "specified" pressure level. Is the harsher ride desirable?

That is wrong, an E rated tire is an LT tire. Go to Toyos website and download their inflation chart (applies to any brand of tire). A P rate tire can actually hold more weight than an LT tire (C,D,or E) at the OEM PSI which is usually around 35 psi. The chart will let you figure out the required PSI based on a switch from a P rated to and LT rated tire as well as going to a different tire size. For most around 45 psi on a LT tire is equivalent to running 35 psi in the stock P rated tire. The load range of the LT tire does not matter (C,D, or E), they will all be run at the same pressure to handle the load rate that the OEM P tires are supposed to handle. Running an LT tire at too low of a pressure can cause it to heat up and possible have a tire failure. Running them too high will just cause them to wear out in the middle and give a much harsher ride. On my old 2002 I rand Cooper AT3 load range E at 46 psi because that is what the chart showed was the same load range rating as my stock P rated tires. On my Ford work truck I run them at 44 psi on a load range E (what the chart showed from going to a bigger LT tire from the small stock P rated tire).

  • 4 years later...
davevinc1080 Enthusiast

davevinc1080

Posted
Posted

275/70r18 BFG KO2 on double cab 4x4 Silverado. 3k miles so far on tires. 78k miles on the truck. The psi was Too low from tire shop.....then tried 52 psi for a bit.....settled on 47ish psi for now. Rougher than stock ride and a bit louder but so far very impressed with the tire. Driving on Winter and harsh roads in Ontario. 

  • 3 weeks later...
Payton34 Enthusiast

Payton34

Posted
Posted

I have 35x12.5 r20 Toyo RT and I called Toyo and they said 35psi for my truck. Call them they will ask make model of truck and tell you the correct psi for the larger size tire. there is a conversion chart they also have on the website to convert from stock tire rating and psi to e load psi for 1/2 ton truck.


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IronVilkas Enthusiast

IronVilkas

Posted
Posted

You can do the tire chalk method as well. Do this a couple times and find the right wear pattern to get good life out of the tires

 

dieselfan1 Senior Enthusiast

dieselfan1

Posted
Posted
On 3/9/2020 at 7:35 PM, Payton34 said:

I have 35x12.5 r20 Toyo RT and I called Toyo and they said 35psi for my truck. Call them they will ask make model of truck and tell you the correct psi for the larger size tire. there is a conversion chart they also have on the website to convert from stock tire rating and psi to e load psi for 1/2 ton truck.


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I have Nitto Ridge Grapplers 37x12.50x20 and Nitto says to run these at 30 psi cold. Wonder why yours are supposed to be 35?

Bash74 Enthusiast

Bash74

Posted
Posted
I have Nitto Ridge Grapplers 37x12.50x20 and Nitto says to run these at 30 psi cold. Wonder why yours are supposed to be 35?
The best thing to do is run it at the pressure you need for what you are doing at that time. My tires are one pressure if I am on pavement, different if towing, different if my whole day is going to be off road in soft soil and dirt. Also, my front and rear are always different because of weight distribution.

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