Will A Trailer Wheel With A 2280lb Load Rating Hold Up To 110 PSI From ST235/80R16 Tire?

Question

Question:

I am looking to upgrade my tires/wheels on the 5th wheel. It is rated at just over 10k LBs and I am currently in the process of upgrading the axles as Ive had one fail. The new custom axles are 6k lb cap with 6 on 5.5 hubs and 12in brakes. I understand this does not increase the load cap of the trailer but the peace of mind is what Im looking for. I also just recently upgraded the suspension to the Roadmaster slipper spring 5k lb kit with shocks. I am looking at getting these wheels with the Provider ST235/80R16 Radial Trailer Tire - Load Range G - PRG80235 on them. My concern is the PSI. with a wheel rated at 2280lb can the wheel handle the 110psi? I know I will never come even close the rating of the tire which is what I am wanting....peace of mind. Thanks for your input.

asked by: Brad V

0

Expert Reply:

I would be happy to help!

Wheels do not have a PSI rating, as that rating is solely for the tire, and the valve stem. Since the Provider ST235/80R16 Radial Trailer Tire - Load Range G # PRG80235 have a max load of 4080lbs at 110 PSI you will need to use a valve stem rated for that much pressure or more. I recommend going with the Americana Metal, Bolt-In Valve Stem - 1-1/4" Long # AM20906 which is rated for well over 100 PSI, and will hold up perfectly with 110 PSI.

When it comes to the wheel the only limiting factor will be the load rating. In the case of the wheel you mentioned you would be limited to 2280lbs, even though the tire is rated for much more, as you are limited by the lowest rated component.

Now if you went with the Aluminum Viking Series Valhalla Trailer Wheel - 16" x 6" - 6 on 5-1/2 - Silver Spoke # TA75FR you were looking at that has a 2830lb load rating, you would be limited to 2830lbs as that is the lowest rating between the tire and wheel.

Lastly to make sure this tire will fit on your trailer, you will need to compare its height and width to your current tires. The # PRG80235 measures 30.8" tall, and 9.3" wide. The general rule of thumb is there needs to be 3-4" clearance between the top of the tire and the bottom of the fender, and 1-2" between the inside edge of the tire and the frame.

If you can tell me what size tire is currently on your trailer I would be happy to confirm if these tires will fit.

I included videos of the products mentioned for you to take a look at.

expert reply by: Samuel C

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Answer 1

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 2

The offset of the Taskmaster Trailer Wheel part #TA75FR is 3-1/2 inches.

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Answer 3

I recommend the West the Westlake ST235/80R16 Radial Trailer Tire, Item #WE76FR. This is a load range G suitable for use up to 4,080 lbs per tire at 110 psi. Four of these would put you at a max load of 16,320 pounds. This tire has a 75 mph speed…

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Answer 4

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 5

The Dexter Wheel Bolt #7-262 that you referenced is indeed extremely close to the measurements on your existing bolt and it should work great as a replacement. This is the closet option we have available. I did also go out to our warehouse just to…

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Answer 6

If your current springs have 5 leaves then going to a 7 leaf spring will increase the height of the trailer a little and make the trailer more susceptible to sway. Regarding capacity if you go with springs rated higher than what is required it will…

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Answer 7

I agree it is the right time to upgrade to a Lithium charger/converter as not all are Lithium compatible. I recommend using the Progressive Dynamics Mighty Mini AC/DC Panel and Converter/Smart Charger - 60 Amp #PD4060K which is a replacement for your…

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Answer 8

For the LCI52-SB-86.5-68.5, the two ending measurements are: 1st - measurement from hub to hub, meaning the length of the axle in this case is 86.5 inches. 2nd - spring seat dimension where they're welded, meaning the spring seats are 68.5 inches…

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Answer 9

You will need the Red LED Trailer Clearance or Side Marker Light #328-K-52 or Amber LED Trailer Clearance or Side Marker Light #328-K-51 for your 2018 Forest River Sunseeker motorhome. These lenses have the same Top Command SAE-AP2-16 markings on the…

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Answer 10

The correct replacement for a Demco Master Cylinder 05680-C is the Replacement Master Cylinder part #5650. I spoke with Demco to confirm this for you.

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Answer 11

The correct replacement master cylinder kit we have for your Demco setup is the part #DM5918 which comes with the lock out replacement.

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Answer 12

It could be a tow package fuse on the vehicle. Use the owners manual to find the locations of fuses/relays related to the tow package wiring to check them and replace as needed. If the issue is not a fuse or relay then you can test the vehicle side…

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