Changing Out 205/75-14 Tires for Larger 215/75-14 Tires with Greater Weight Capacity

Question

Question:

Load range, tire dimensions and highway speed limitations for 215/75 trailer tires. Tired of changing flats on my single axle 16 foot travel trailer. presently fits 205/14 load range C. These just fit the wheel wells.how much larger is the 215/75. I could enlarge the wheel wells a certain amount, but how much wider and larger in diameter would the 215 tire be compared to the present 205 tires. What would be the gain in carrying capacity with 215/75 load range D? If necessary, I can cut away the outside wheel well skirt and put spacers behind the wheels to gain side room for the new wheel/tire combination, an even add lift blocks to the axle to gain extra diameter space.

asked by: Clayton S

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Expert Reply:

The 215/75-14 tire would be about 1/2 of an inch wider than the 205/75-14 tire and about 3/8 of an inch larger in diameter. Our tire size guide estimates that your load range C 205/75-14 tires have a capacity of about 1,760 lbs.

For a 215/75-14 load range D tire, I recommend the Provider ST215/75R14 Radial Trailer Tire, # TTWTRTM2157514D. This tire has a maximum load capacity of 2,200 lbs, which would increase your current capacity by about 440 lbs per tire. This tire is also rated for a speed of 81 mph.

Another option would be to keep the same size tire you currently have, 205/75-14, and simply increase your load range. Our load range D Karrier ST205/75R14 Radial Trailer Tire, # AM10235, has a maximum capacity of 2,040 lbs, which is still a considerable increase from your current tire. As there is no speed listed for this tire, this indicates that the manufacturer did not speed-rate this tire, so the speed defaults to 65 mph.

I have attached a FAQ article about tires as well as an article on measuring trailer tires for you to check out.

expert reply by: John H

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Answer 1

Tire designations ST205/75D14 and ST205/75R14 are both for special trailer tires with a 205mm width, 75-percent aspect ratio and that fit a 14-inch wheel. The difference between them is the tire's type of construction. The ST205/75D14 tire is a…

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Answer 2

The standard bolt pattern for trailer wheels that are 14 inch in diameter is 5 on 4-1/2 inch like the #AM20352. I attached a help article on determining bolt pattern for you to check out as well.

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Answer 3

I recommend a 5-lug setup. For this you would have to get the tire and the wheel separately. You could go with the Karrier ST225/75R15 Radial Tire #AM10303, it has a weight capacity of 2,830 lbs at 80 psi and a speed rating of 81 mph for your tires.…

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Answer 4

There is an option for a 14 inch wheel similar to the steel directional trailer wheel you mentioned, with the difference being that the wheel comes in silver and not chrome: - Dexstar Steel Directional Trailer Wheel - 14" x 5-1/2" Rim - 5…

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Answer 5

I would be happy to go over the tire options available for your 2015 Forest River R-Pod 178. First off I am sorry to hear you had a bad experience with the replacement tires you had installed last year. I recommend sticking with the ST205/75R14 tire…

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Answer 6

The advantage you get from going to a higher tire Load Range is increased weight capacity for the tires. If your current tires are adequate for the weight of your trailer you really wouldn't gain anything by going to a higher Load Range than…

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Answer 7

That would all depended on the aspect ratio of the 215 tire. For example, a ST205/75-14 tire has an overall diameter of 26.1" and width of 8.1". A ST215/75-14 tire has an overall diameter of 26.7" and width of 8.5". Therefore, as…

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Answer 8

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 9

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 10

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

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Answer 11

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 12

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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Changing Out 205/75-14 Tires for Larger 215/75-14 Tires with Greater Weight Capacity

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