What is the Difference Between Load Range C and Load Range D Tires

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Question:

What is the difference between load ranges on trailer tires? Specifically, C compared to D? I have a single axle 12 flatbed with 15 tires.

asked by: Andy

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Expert Reply:

The difference between load ranges varies based on the tire size and brand. When comparing two tires of the same size and brand, a load range D tire will always have a greater weight capacity and psi rating than a load range C.

However, when comparing two dissimilar tires, such as a size 145/80-12 tire and a size 185/80-13 tire, the load ranges will not correlate with one another. For example, a load range D tire in size 145/80-12 has an average capacity of 1,220 lbs, while a load range C tire in size 185/80-13 has an average capacity of 1,480 lbs. So, in this case, the load range C tire has a greater capacity than the load range D tire. It's best to check the weight capacity of an individual tire to compare between load ranges.

Our 15” diameter tires in load ranges C and D come in two different sizes.

For a 205/75-15 tire in load range C, I recommend the Provider Radial Trailer Tire, # TTWTRTM2057515C. This tire has a weight capacity of 1,820 lbs and includes a 2-year warranty. For a size 205/75-15 in load range D, I recommend the Westlake Radial Trailer Tire, # LHWL300. This tire has a weight capacity of 2,150 lbs, includes a 5-year warranty, and comes with 2-year complimentary roadside assistance.

For a 225/75-15 in load range C, I recommend the Provider Radial Trailer Tire, # AM10251. This tire has a weight capacity of 2,150 lbs and includes a 2-year warranty. For a load range D in this size, I recommend the Provider Radial Trailer Tire, # TTWTRTM2257515D, which has a weight capacity of 2,540 lbs and includes a 2-year warranty.

expert reply by: Amber S

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Answer 1

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 2

Yes, you can replace your load range C tires with load range D tires without issue. It will only become any issue when you go down load ranges, not up. The tires will have the same overall diameter as long as they are the same size regardless of…

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Answer 3

Hey Lee, so in general the radial tire construction is preferred over the bias ply. You'll get a more stable ride and generally a little less heat build up. If you will be under the weight and speed capacity of your current tires I think…

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Answer 4

We have trailer tires in the size of 5.30-12 that have a higher speed rating like the part #TT53012C but we do not have them mounted on a wheel. This tire is rated for 81 mph. So you could go with the tire and have them mounted on your current wheels…

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Answer 5

It doesn't look like you have a whole lot of extra fender clearance on your motorcycle trailer so I'd recommend sticking with the tire size you have now and going with a higher speed rating like the part #TT53012C which is rated for up to 81…

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Answer 6

To change your hub bolt pattern will require you to change hubs to one that has the bolt pattern you need. You will need to know what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a…

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Answer 7

Here is a list of all our 15" x 6" wheels with the 5 on 4-1/2" bolt pattern. These wheels are all going to be capable of supporting the 110psi tire pressures. Dexstar Steel Mini Mod Trailer Wheel #AM20545 Aluminum Sendel Series T07…

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Answer 8

We offer a 15x5 white painted trailer wheel with a 5 on 5 bolt pattern, part #AM20428, which sounds like what you are looking for. The wheel is indeed manufactured by Dexstar. If you would care to reply with the tire size and load rating information…

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Answer 9

A 15x6 inch size wheel is normally interchangeable with a 15x5 size wheel. The 6 inch and 5 inch measurement being the width of the wheel. A tire will normally fit on a range of wheel widths. Where you want to pay attention to the different widths of…

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Answer 10

If you are talking about the same tire you would want to keep it inflated to the maximum psi indicated on the tire sidewall. With less air pressure the capacity will decrease. Also, when under inflated a trailer tire will build up excessive heat and…

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Answer 11

The Karrier ST175/80R13 Radial Trailer Tire with 13" White Wheel part #AM31985 for radial or Loadstar ST175/80D13 Bias Trailer Tire with 13" White Wheel part #AM31233 for bias is just what you are looking for and they should both work well…

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Answer 12

The three radial special trailer (ST) tires we offer in size 215/75-14 can be seen on the linked page. These include the Taskmaster #TTWTRTM2157514D in Load range D, the Provider #TTWTR21514 in Load Range C and the Kenda Karrier #AM10229 also in Load…

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What is the Difference Between Load Range C and Load Range D Tires

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