What Should Tire Pressure be for a Load Range G 110 psi Tire

Updated 10/07/2024 | Published 03/16/2018

Question:

I have a raptor 384pk triple axle with a gross wt.of 18500 lbs. My question is how much pressure should I run in the tires? Max pressure on these load G tires is 110 psi. I was running Load E tires prior to the new set of load G tires.

asked by: Jake P

Expert Reply:

You always need to keep your trailer tires filled to the max cold psi rating. If your current load range G tires have a 110 psi rating then that is what you need to keep them filled to.

Tire blowouts are a result of damaging a tire (like hitting curbs), under or overfilling a tire, exceeding the speed rating for the tire, exceeding the weight limit, or even messed up suspension parts.

For example, the Provider ST235/85R16 Radial Trailer Tire # TTWPRG235R16 has a load range G which is 4,400 lbs at 110 psi for a single tire application like what you have. It also has a speed rating of M which is 81 mph. If you don't have the tire filled to 110 psi then it will get hot quickly and can cause a blowout. Most trailer tires have a speed rating of 65 mph so if you were exceeding that speed limit then that would also explain the blowout.

If you have been following all of the requirements for your tire when you had the blowout then you may want to check to make sure your suspension is in good working order.

expert reply by: Jon G

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Melvin R.

8/8/2020

What is the safe tire temp for a G rated tire at 110 PSI. I cannot find this info anywhere. The tire is a Geostar 574. Tire running at 110 cold. Operating range would be helpful.

Jon G.

8/19/2020

The max high temperature rating for a tire would be 167 degrees. We have some tire pressure monitor systems that have a max temp rating of 185 degrees but it starts sending alerts at 167 degrees (Fahrenheit). So your tires sitting at 110 degrees cold should be just fine.

Elizabeth

5/14/2024

I recently went from Load F to G on my 5th wheel trailer tires. The max cold psi was 80 and now is 110. Do I have to worry about the rims being able to handle the extra psi pressure that the tire calls for? I now you say to run max cold psi. I cannot find any markings on the rims.

Jon G.

5/14/2024

@Elizabeth If your wheels don't have a psi rating then they'll be fine, but you'll need to make sure you have metal valve stems # AM20906 as they can handle up to 200 psi, but the rubber valve stems can only handle up to 100 psi depending on what rubber valve stems you have. swap them out to metal and you'll be good to go!

Elizabeth

5/14/2024

@JonG Thank you!!

Chuck H.

10/6/2024

@JonG I upgraded from E to G load rated tires. My 5th wheel GVWR is 12,000lbs. Give me a logical reason why I would not use the manufacturers inflation chart, rather than using Max Cold @110psi. 110psi would allow the tires to carry over 16,000 lbs. FYI, Doscount Tires used 75 psi