Wheel and Tire Recommendation to Give Additional Ground Clearance Over a 175/80R13 Tire

Question

Question:

i have a concession trialer with st 175/80/13 tires on it the bolts that hold the axle to the spackes are very close to the ground and sometimes i hit... if i go with a b78/13 st nylon tire will i get more ground clearance

asked by: Mark P

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Expert Reply:

The old tire size B78-13 is actually very close in size to the 175/80-13 that you currently have so I would not recommend going to that size to gain ground clearance.

The only bigger 13 inch tire that we carry than the 175/80-13 is the 185/80-13 which only gains you about .3 of an inch so it probably wouldn't be a worthwhile upgrade.

The best possible upgrade I could recommend for you would be to go with a 14 inch rim and a slightly larger tire, assuming you have the clearance for a wheel and tire that has 2.2 more inches in diameter.

If you do have the clearance and a 5 on 4-1/2 inch bolt pattern hub (you should, but I attached an FAQ article on how to determine this for you to double check) you should check out the Karrier ST205/75R14 Radial Trailer Tire with 14" White Wheel part # AM32153. This should give you a little more ground clearance.

You will want to make sure you have the fender clearance for the additional diameter of the tire and clearance for the additional width the tire will have. This tire will be 1.1 inches wider than what you currently have.

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

expert reply by: Jameson C

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Answer 1

I am not really sure what the dealership was referring to as a 22 axle but we do have options for you to lower your trailer. The first option if you have a leaf spring axle is an over/under kit like the Dexter Trailer Springs Over-Under Conversion…

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Answer 2

Normally, at the very least, there should be 2 inches between the tires on a dual axle trailer. This will allow the suspension components room to work properly. Also, if the axles are too far apart, the tires are more likely to drag some when…

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Answer 3

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 4

Karrier and Loadstar are two different brand names used by Kenda. There's no difference in quality or function between the two brand names. For a ST175/80-13 Radial trailer tire in load range D, I'd recommend part #AM10210 if you're…

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Answer 5

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 6

The B78-13 tires you mention convert to metric size 175/80-13. The 175/80-13 tires are available in three load ratings. B: 1100 lb at 35 psi C: 1360 lb at 50 psi D: 1610 lb at 65 psi You would choose the load rating based on the capacity of your…

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Answer 7

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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Answer 8

The difference between the letter D in your ST175/80D13 and the R in the tire size of the Wheel and Tire ST175/80R13 part #AM31985 that you referenced is the tire construction. D stands for bias-ply which is a less preferred tire construction,…

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Answer 9

You should always follow what is printed on the side of the tire from the trailer tire manufacturer. Tires inevitably get replaced over time so what was printed on the trailer will no longer be accurate. For trailer tires, this will typically be the…

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