Should ST235/80R16 Load Range G Trailer Tires be Inflated to Max PSI

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Question:

I bought 4 brand new cooper Hercules 235/80/16 tires for my fifth wheel. It says on the tire max inflation 110 they are G rated. I put 105lbs in them because I new they would go up in the road. But I have a tire monitoring system in my truck and with in 30 minutes on the road it said all of them were at 118-120 psi. Is this ok? Or should I lower my cold air pressure? Thank you very much.

asked by: Peter M

1

Helpful Expert Reply:

Size ST235/80R16 trailer tires should be inflated to their max - or very close to it - psi, so what you are experiencing is normal. We don't offer Hercules so I can't speak to those, but for example the Westlake ST235/80R16 Radial Trailer Tire - Load Range G # WE76FR also has a max 110 psi.

It is expected that the psi is going to raise when you get on the road, and the tire is built with that in mind. However, heat build up is also one of the reasons they have a speed rating, with the # WE76FR having a 75 mph speed rating, so you want to make sure you stay at or (ideally) a bit under the rating of your tire.

expert reply by: Kyle S

1

Answer 1

A 235/80-16 Load Range E tire typically has a 3520 lb capacity, while the Westlake #WE76FR Load Range G tire you looked at will have a 4080 lb capacity. You can certainly go with a higher load rated tire if you wish, as long as the combined…

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Answer 2

The psi rating on the sidewall of all trailer tires is the cold PSI rating, meaning the tire should be inflated to that psi rating before the tire heats up. If your tire says 80 psi, then the manufacturer intended for that tire to be inflated to 80…

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Answer 3

Special trailer tires should always be inflated to the maximum psi pressure figure shown right on the tire sidewall. Always check pressure and inflate as needed with the tires cold, such as first thing in the morning. As you drive and as the daytime…

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Answer 4

With trailer tires you want to inflate them to the max PSI listed on the sidewall when they are cold and any pressure fluctuations are fine as long as you aren't overloading the tire and are below the speed rating. Yours going up to 120 psi when…

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Answer 5

The generally accepted rule for psi increases with temperature is that for every 10 degree change there is a 2% change in psi. For tire pressures like yours like #WE76FR that require 110 psi that ends up being 2 psi for every 10 degrees of…

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Answer 6

The only reason to switch to a load range G tire (14 ply rating) like the #WE76FR over your current load range E tires would be if the current tires do not have a high enough capacity. If the current tires are underrated you will have problems and…

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Answer 7

Usually when we see cracking around the sidewall of a trailer tire it means it is starting to dry rot and needs to be replaced with a new tire, like the Westlake 235/80R16 #WE76FR. Tires have a lifespan of 3-6 years or 10,000-12,000 miles, whichever…

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Answer 8

Nope, the 14 ply Westlake ST235/80R16 Radial Trailer Tire - Load Range G #WE76FR will not cause damage to any inside fixtures inside your 5th wheel toy hauler. It will also not be harder on sharp turns when backing into campsites.

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Answer 9

The correct tire pressure will depend on what is listed on your tire. Trailer tires should be inflated to the max psi. This could vary depending on the manufacturer, so it is important to follow what is printed on the side of the tire. For example,…

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Answer 10

We don't sell Sailun so have no information about them or their quality whatsoever. The best load range G 235/80R16 trailer tire is the Westlake ST235/80R16 Radial Trailer Tire - Load Range G #WE76FR. The #WE76FR has a deep 11/32" tread…

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Answer 11

The recommended/max pressure for the Westlake ST235/80R16 Load Range G part #WE76FR is 110 psi. With trailer tires like this it is important to always run the max psi to ensure you don't reduce your weight capacity and/or create excessive heat…

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Answer 12

When installing/adjusting the Solera RV Slide-Out Awning #LCV000163285 tension is applied by rotating the awning roller 14 times. This should apply the needed spring tension so that the fabric doesn't billow in the wind or leave enough slack that…

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Should ST235/80R16 Load Range G Trailer Tires be Inflated to Max PSI

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