What Tire Load Rating Is Needed For Tandem Axle Trailer With 7000 lb Capacity?

Question

Question:

What tire rating should I have in a 205 75 15 C Or D. 7000 lb trailer dual axle

asked by: Tom

1

Helpful Expert Reply:

For a tandem axle trailer rated for 7000 lbs, you can use either a Load Range C or D tire. Each axle will be rated for 3500 lbs so you need a tire that will carry 1/2 that capacity. That would make your minimum load range before limiting your system or 1750 lbs. The Provider ST205/75R15 Radial Trailer Tire w/ 15" White Mod Wheel - 5 on 4-1/2 - Load Range C # TA47VR are rated for 1820 lbs at 50 psi and have a speed rating of up to 81 mph. This is a great tire, so the only reason for an upgrade to load range D is a higher ply rating on the sidewall of your tire.

If you want that, I recommend the Provider ST205/75R15 Radial Trailer Tire with 15" Vesper Silver Mod Wheel # MX97FR with a 2150 lb capacity at 65 psi and the same speed rating of up to 81 mph.

For just the tires, the parts are # TR20515D and # TTWTRTM2057515C
.

expert reply by: Jason S

1

Johnny

8/3/2020

I just bought a twin axle trailer, it's heavy duty, it was used to carry a small excavater at one time. I am going to use it to carry my golf cart. My "Q" is, can l register this trailer as in a "lite class" catagory?

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Jon G.

8/12/2020

I'm pretty sure the weight class has to do with the GVWR of the trailer and not what you plan on using the trailer for. I'd try checking your State laws and maybe your local DMV or highway patrol for guidance on this.

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Chuck M.

9/15/2020

@JonG in PA you can register the max the trailer is rated for or below. So weigh your trailer with the max load you will carry and the total is what you need to register. We had a DMV officer explain it.

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Jon G.

9/16/2020

@ChuckM Good to know, thanks for sharing!

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Chad T.

5/4/2020

Would a st205/75r15 omni trail tire work for a 26 foot tandem axle rv 3500 gvw front and rear. It is class D 8 ply 107 tire load index. thank you

Reply

Chris R.

5/7/2020

Yes, this tire size and load rating would provide more than enough capacity for a 3,500 pound trailer.

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Answer 1

Your math is correct in your trailer weight load example. If a fully-loaded tandem axle trailer weighs 4000-lbs then each of the 4 tires will bear 1/4th of that load, or 1000-lbs. In this case a tire rated for 1300-lbs would provide a good safety…

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Answer 2

To be frank the only difference you will really notice going to a larger ST225/75R15 tire with a load range of E over a ST205/75R15 tire with a load range of D is in your wallet. Slightly larger tires with a bit more capacity are going to cost you…

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Answer 3

The two sizes you mentioned are pretty similar and fit many of the same 15 inch wheels. The 205/75-15 fits rim widths of 5 inch to 6-1/2 inch whereas the 225/75-15 fits widths that are 5 inch to 6 inch. The 205 is 27.1 inches tall and the 225 is…

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Answer 4

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

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Answer 5

It sounds like you have a pretty nice trip planned! Bias trailer tires do not have a set range you can travel as they meet DOT standards for a tire. With that said before you start your trip I would make sure to check your tires for any dry rot or…

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Answer 6

The "D" on your new ST205/75D15 tires stands for diagonal or bias ply construction, meaning that the tire's body plies crisscross. A radial tire's plies like what you previously had on your trailer branch out from an imaginary…

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Answer 7

Thanks for the kind words, Scott! The Americana Wheel/Kenda tire combo you referenced #AM32156 has a 81mph speed rating. I've linked to our trailer tire help article, which contains more information about trailer wheels and tires than…

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Answer 8

The #AM32161 and #AM32153 have powder coated steel wheels which is why they aren't recommended for a boat trailer. Since you're going to be using the trailer for fresh water and not salt water they wouldn't be as susceptible to corrosion,…

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Answer 9

For a wheel that is 5 inches in width and 15 inches in diameter you would want tires that are size ST205/75-15. For the tire size ST225/75R15 you listed you would want a rim that is from 6-7 inches in width. I attached a department page that has all…

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Answer 10

There really isn't a particular maximum trailer weight that is used to determine when brakes need to be added to both axles of a tandem axle setup. While I do still recommend checking your local laws, I am also not aware of any general laws that…

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Answer 11

My contact at Dexter did confirm that the #23-468 Nev-R-Adjust brake assemblies will adjust themselves as you drive after the initial installation, but we still recommend that you do adjust the shoes when you first install the assemblies, so that…

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Answer 12

Etrailer Electric Brake Assemblies like the 12", Self Adjusting #AKEBRK-7R-SA referenced in your question are different than Dexter Brake Assemblies such as #23-459. The biggest difference is the brake pad material used. Etrailer brake pads use…

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What Tire Load Rating Is Needed For Tandem Axle Trailer With 7000 lb Capacity?

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