What is the Modern Tire Size for H78-15 Trailer Tires

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Question:

My tires on my tv are: H78 15st What tires would you recommend. We inherited this trailer from my I laws

asked by: Shawn D

0

Expert Reply:

The modern tire size for the H78-15 tires is 225/75-15. The Karrier ST225/75R15 Radial Trailer Tire, # AM10256, would be a suitable replacement tire. Keep in mind, this is a Load Range D tire which is an 8 ply tire with a load capacity of 2,540 lbs at 65 psi.

I recommend checking the weight capacity of your axles before purchasing a tire. It is important to choose replacement tires that equal or exceed the weight capacity of your axle. Also, it is recommended to replace both tires on an axle at the same time, especially if both of the tires on the axle are H78-15 tires.

expert reply by: John H

0

Brian

3/22/2025

So putting 225/75/15 tires on my camper will be ok instead of the H78-15-st ?

John H.

3/27/2025

@Brian Yes, they are basically the same size, so you won't have any issues with rubbing or fit. As I mentioned above, you'll want to keep an eye on weight capacities, but other than that they are basically the same size tire. It sounds like you might have an old camper. I'm a fan of vintage campers. What do you have?

Answer 1

The overall diameter and width of a Provider #TA99VR 30.79 inches diameter by 9.25 inches wide. A 235/80R16 is 9.3 inches wide and has an outer diameter of 30.8 inches so a bit shorter but a little bit wider. The #PRG80235 is a 235/80R16 that would…

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Answer 2

I believe you mean Load Range since the Load Ranger was the unsuccessful brother of the Lone Ranger. For any given tire size there can be different load ranges. The different load ranges have different weight capacities. This has to do with the…

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Answer 3

The modern equivalent of the H78-15 tires are tires sized at 225/75-15. A good replacement for your tire in this size is the Kenda Karrier 225/75-15 Radial Tire, part #AM10251. This tire has Load Range of C and is a 6 ply (the lowest we have in this…

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Answer 4

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 5

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 6

Hey Bryan, that's a good question. The pricing can definitely be misleading, but I wouldn't use it to judge the quality of the tire. A lot of that comes down to promotions, inventory, and whether you're looking at a tire by itself or…

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Answer 7

The 5.30-12 tires, being wider, are going to make more contact with the road. This means that the noise, and heat build up will be higher than a 4.80-12 tire but the rolling resistance will actually be less because the tire is larger diameter. The…

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Answer 8

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 9

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 inch whereas the 225/75-15 fits widths that are 5 inch to 6-1/2 inch. The 205 is 27.1 inches tall and the 225 is 28.4…

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Answer 10

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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Answer 11

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

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Answer 12

I apologize for any confusion on what the proper torque specs are for 1/2 inch lug nuts on trailer wheels. I attached a picture of a chart to the right that details what the proper torque specs are for a trailer wheels lugs based on lug size, wheel…

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What is the Modern Tire Size for H78-15 Trailer Tires

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