Loadstar ST185/80D13 Bias Trailer Tire # AM1ST79 Recommendation for a D78-13 Trailer Tire

Question

Question:

What is the correct size tire to use to replace my D78-13 tires on my trailer? Thanks.

asked by: Bernie K

0

Expert Reply:

The correct size tire you would need to replace the D78-13 tires that are on your trailer is ST185/80D13.

I would recommend the Loadstar ST185/80D13 Bias Trailer Tire, part # AM1ST79.

I attached an FAQ article on tires below for you to check out also.

If you need a wheel and tire combo on a 5 lug on 4-1/2 inch bolt pattern I would recommend the Loadstar ST185/80D13 Bias Trailer Tire with 13 inch Galvanized Wheel - 5 on 4-1/2, part # AM3S334.

expert reply by: Jameson C

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Answer 1

Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 - Load Range C Item #AM3S120 is rated for 65 miles per hour. If you need a higher speed rating then you can get the wheel and tire separately using tire #TTWTRTM1758013C…

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Answer 2

Going to a larger wheel and tire won't hurt or affect your axle in any way. So if you wanted to go up to a 13 inch wheel and tire size like the 175/80-13 like with the part #AM31985 for a 5 lug wheel or part #AM3S120 for a 4 lug you'd…

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Answer 3

The speed rating of the tire you use will dictate the top speed at which you can pull the trailer on the highway, not necessarily the diameter of the wheels you use. If you were to go with a 12 inch tire with a higher speed rating like the Kenda…

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Answer 4

It looks like you may have meant to type the tire size ST175/80-13. Which for a spare tire and rim you would want the part #AM31985 if you have a 5 lug wheel on your trailer currently or part #AM3S120 for if you have a 4 lug wheel.

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Answer 5

Tire sizes that start with the letter P are for passenger vehicles and should not be used on a trailer. That is also why you can't find the exact same size since that is not a common trailer tire size. Your best option is going to be to replace…

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Answer 6

Most of the differences in the tire/wheel combinations you were looking at come down to the wheel. Out of the available options I recommend going with the #AM3S120 as the tire it comes with is rated to 81 MPH which'll be perfect for highway…

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Answer 7

The difference in the overall diameters of the two tire sizes you listed is big enough that I would not recommend the use of a 5.3-12 tire in place of a ST175/80D13. The 5.3-12 will be 21.9 inches overall, whereas the ST175/80D13 measures 24.1…

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Answer 8

The wheel of the Loadstar #AM3S120 that you referenced will fit on the HaulMaster 66771 trailer that you have now. The problem you'd have though is that this is a much taller setup since it's a 13 inch wheel instead of what you have now that…

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Answer 9

The tire included with tire and wheel combo #AM3S120 is rated for 65 miles per hour. If you need something rated higher what I recommend is wheel #AM20222DX and 175/80-13 load range C tire #TTWTRTM1758013C. This tire is rated for 81 miles per hour. A…

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Answer 10

Yes, the Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel - 4 on 4 #AM3S120 has an 81 mph speed rating and will work well for highway use. In regards to the bearings, you'll need to inspect them and if they are in good condtion…

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Answer 11

Sounds like you have a 13 inch wheel with a 4 on 4 inch bolt pattern. You can verify this by checking out the help article I attached that details how to determine bolt pattern. The part #AM3S120 is a 13 inch wheel that has a 4 on 4 bolt pattern that…

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Answer 12

We do have a nice selection of ST175/80D13 trailer tires available that are mounted on a wheel with a 4 on 4 inch bolt pattern. I recommend taking a look at the Kenda Loadstar #AM3S120 that features a maximum load of 1,360 pounds at 50 psi and an…

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Loadstar ST185/80D13 Bias Trailer Tire # AM1ST79 Recommendation for a D78-13 Trailer Tire

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