Modern Size for Trailer Tire G78-15

Question

Question:

Can I put a g78-15 tire on a 15x7 rim?

asked by: Mario M

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Expert Reply:

The Metric equivalent of the G78-15 load range C trailer tire is a 205/75-15 tire which is designed to fit up to a 6-1/2 inch wide rim. There is a very good chance you could mount the tire on a 7 inch wide rim, but a better option would be to go with a ST225/75R15 as this is a similar size that I can guarantee will fit a 7 inch wide rim. For that you would want the part # AM10303.

expert reply by: Jameson C

0

Answer 1

Yes, the Provider Radial Tires, #TR20515D, will be a good replacement for your G78-15 tires. The G78-15 tires have an overall diameter of 27.1" and the 205/75/15 have a diameter of 27.13". Your clearance of just 2" is concerning.…

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Answer 2

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…

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Answer 3

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 sides…

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Answer 4

Yes, ST205/75D15 tires would be able to replace your ST205/75R15 tires as they are the exact same size, with the only difference being the D tires are a bias ply, and the R tires are a radial. I recommend sticking with a radial tire like the Karrier…

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Answer 5

The 78-14 tire size is the same as the modern tire size of 205/75-14 which we offer on a similar white wheel as yours with #AM32161.

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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

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

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

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 10

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 11

Since both a ST145/R12 size tire, like the Kenda Karrier S-Trail #AM10130, and a 5.30-12 size tire, like the Kenda K353 #AM10068, fit a 12 inch wheel, a ST145/R12 size tire can replace a 5.30-12 size tire. Keep in mind that these tires do have…

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Answer 12

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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Modern Size for Trailer Tire G78-15

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