What are Trailer Tire Sizes H78-15 and G78-15

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Question:

I have two trailers I’m looking to replace tires one old horse trailer numbers on sidewall F78-15 The other trailer was a travel trailer Triple axel marked H78-15 I’m assuming The 78 was the year lol from the looks it probably was but anyway I’m shopping and have know idea tire sizes and fit what should I be looking for other than I’m guessing 15” tires which seems odd because when I measure the rim it’s a 16”

asked by: Kim P

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Expert Reply:

The trailer tire size of F78-15 is actually the modern size number of 205/75-15 and the H78-15 is the 225/75-15. When you measure the rim you actually have to subtract an inch due to the lip that does not count as diameter which is why your 15 inch wheels are measuring 16.

For the 225/75-15 size the Westlake part # LHWL304 is a really great option with a higher speed rating, weight capacity, and comes with a great warranty that includes roadside assistance. Then for a similar 205 size we have the # LHWL300.

expert reply by: Jameson C

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Answer 1

The degrees represents the angle of the cone that is on the wheel bolt. If they are 90 degree then the cone is a 90 degree angle made by the angle created by each side of the bolt. A 60 degree lug bolt would have a 60 degree angle made by each…

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Answer 2

I certainly have everything that you will need for your camper but first we need to determine how much solar you need as there are several factors that go into selecting the proper size solar panel. The best way to do this is to go camping like you…

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Answer 3

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 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

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

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Answer 6

The three most common lug stud sizes for a trailer are 1/2"-20, 9/16"-18, and 5/8"-18. In order to make sure you get the correct lug nuts you need to measure the lug studs on the trailer now as we have no way to look this up for…

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Answer 7

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 8

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 9

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 10

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 28.4…

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Answer 11

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 12

A BT8 spindle would have a diameter of .99 of an inch where the bearings would both install and would have a diameter of 1.24 where the great seal would ride. That would require a hub part #AKIHUB-440-2-1K for an idler hub. A BTR spindle would have…

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What are Trailer Tire Sizes H78-15 and G78-15

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