Can 185/80-D13 Tires Be Swapped Out for 175/80-D13 Tires On a Trailer

Question

Question:

Can I run a 175 80 13d on my single axle boat trailer instead of 185 80 13d?

asked by: Edward M

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Expert Reply:

Yes, you can replace ST185/80-D13 tires with ST175/80-D13 tires on your trailer. The only difference between them is .7" diameter and .4" width so the trailer will drop about .35". For a ST185/80-D13 tire, I recommend the Loadstar ST175/80D13 Bias Trailer Tire part # AM1ST77 which has a load range D rating (1,610 lbs) and it comes with a two year warranty.

expert reply by: Conner L

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Answer 1

In height or total diameter, a 185/80-13 and 175/80-13 like part #AM1ST77 only differ by about 5/8 of an inch. The 185 would have a diameter of 24.65 inches while the 175 would have a diameter of 24.02 inches. The section width, or thickness of the…

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Answer 2

Trailer tires do not need to be balanced like passenger tires on a vehicle do. Our tire and wheel combos are balanced by mounting the high heavy spot on the tire so that it is aligned with the low light spot on the wheel. They can be balanced at a…

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Answer 3

Having different size tires on your trailer can cause a couple of different issues. The first one being that they have different weight capacities. Your 4.8-12 ranges from 785 lbs at 60 psi to 990 lbs at 90 psi whereas your 5.3-12 ranges from 840 lbs…

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Answer 4

We offer both of the trailer tire sizes you mentioned, ST175/80R13 and ST185/80D13. In terms of size they are very close to one another; the ST175/80R13 size measures 24.1-inches in diameter and 6.9-inches wide while the ST185/80D13 size measures…

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Answer 5

I have attached a chart you can check out that describes the torque needed per wheel size, wheel stud size and material. For an 8-inch wheel with a 1/2-inch wheel stud the torque is 75 to 86 ft-lbs. For a 15 inch steel wheel with 1/2 inch wheel studs…

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Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 7

A higher load range tire has a higher ply rating but it will also produce a rougher ride and could have a psi rating that exceeds the capacity of the wheel or, more likely, the valve stem. The size you have now, 225/75-15 load range C, is rated for…

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Answer 8

The easy answer is that as long as there's an "ST" in front of the tire size it's going to be totally fine and safe to use on a camper trailer. That said, a 175/70-13 tire size is not a standard trailer size so most likely what you…

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Answer 9

Typically higher load ranges of tires means higher capacity and a higher max PSI. For example the Loadstar ST175/80D13 Bias Trailer Tire Load range D part #AM1ST77 has a maximum load rating of 1,610 lbs at 65 PSI. While the same tire in load range C,…

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Answer 10

There are really two reasons to replace a grease seal, if they are damaged or worn and leaking grease then that is an obvious factor. If you are replacing bearings it is usually best to replace the grease seals as well because although they may still…

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Answer 11

You will more than likely be just fine replacing your 175/80R13 tires on your boat trailer with ST185/80R13 tires like the Kenda Karrier ST185/80R13 Radial Trailer Tire - Load Range D #AM10208 due to them being so close in size. The ST185/80R13 will…

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Answer 12

The size difference between the Kenda Karrier ST175/80R13 Radial Trailer Tire - Load Range D #AM10210 and a 185-80R13 tire is the diameter and the width. We don't have any radials in that size, so I'll compare to the similar Kenda Loadstar…

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Can 185/80-D13 Tires Be Swapped Out for 175/80-D13 Tires On a Trailer

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