Comparing 175/80-13 And 185/80-13 Tires

Question

Question:

175 80r13D vs 185 80r13D trailer tires I would like to know if the tire size difference will affect tracking straight, more bounce or less bounce on the trailer? Will the height and the width difference made for better tracking or less? If running at less than weight capacity for example a lighter load should I run the tire pressure lower?I forgot to ask which one is likely to have less wobble at higher speeds. I am assuming it is the 175/80R13D. Due to the tire is not as tall. Do these tires have a speed rating, as they are not car tires but trailer tires. Some states have speed limits that are 80 miles an hour and some have speed limits of 55. Whoud a D load have less wobble and then a C load tire?

asked by: Jamie

0

Expert Reply:

The size difference between the Kenda Karrier ST175/80R13 Radial Trailer Tire - Load Range D # AM10210 and a 185-80R13 tire is the diameter and the width. We don't have any radials in that size, so I'll compare to the similar Kenda Loadstar ST185/80D13 Bias Trailer Tire - Load Range D # AM1ST79. The 175/80-13 tires have a diameter of 24.1 inches and a width of 7 inches compared to the slightly larger 185/80-13 tires that have a diameter of 24.4 inches and a width of 7.2 inches.

The speed rating is based on the specific tire, not the size. The larger # AM1ST79 is rated M for 81 mph. The # AM10210 was recently adjusted to meet the 81 mph speed rating. In this case a bias tire is rated for higher speed but even with the Load Range D being the same category, the bias tire has a load capacity of 1,710 lbs at 65 psi compared to the radial at 1,610 lbs at 65 psi. You won't have tire wobble based on load capacity most of the time, but rather based on speed capacity and weather conditions. Bounce would be affected by load capacity as loaded a highter capacity tire may have better traction when loaded, but unloaded could have more bounce.

For your specific size of tire, I recommend the # AM10210 radial tire of the same size or the slightly smaller size of 175/80-13. I know it isn't the comparison you asked for with two radial tires, because I don't have the one size to judge from but in most cases the radial tire will win out because it can disperse weight better so it has less heat at highway speeds.

You should always run your tires at max psi weather loaded or unloaded for safety. Less tire pressure will cause a safety issue by reducing traction and increasing possiblity of blow out.

expert reply by: Jason S

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Answer 1

In height or total diameter, a 185/80-13 and 175/80-13 like part #AM1ST77 only differ by about 5/8 of an inch. The 185 would have a diameter of 24.65 inches while the 175 would have a diameter of 24.02 inches. The section width, or thickness of the…

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Answer 2

Hello Don, thanks for reaching out. As far as the ST175/80R13 tires, the highest weight capacity we offer would be 1,650 lbs like the Karrier ST175/80R13 Radial Trailer Tire - Load Range D #KE78KV. If you are needing a higher weight rating, you will…

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Answer 3

You sure can Shane. The Double Lip Grease Seal item #10-60 is .004" of inch larger but it will work with the CE Smith Trailer Hub Assembly item #CE13311. The CE Smith Trailer Hub Assembly item #CE13311 is sold individually and is designed for…

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Answer 4

In order to achieve the full capacity of the ratchet straps and the track, the direction of the pull should be parallel to the direction that the e track is running. How much the capacity would be diminished by pulling 90 degrees to the side will…

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Answer 5

The best option we have that will fit your wheel and work well is the Lionshead tire part #LHWL101. The quality and construction of this tire is unmatched but I really like about it is the fact it has a 75 mph speed rating which is higher than most…

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Answer 6

A 5.30 X 12C tire is going to be your best replacement. If you need the 4 on 4 inch bolt pattern #AM30780 is a good option, or #AM30820 for the 5 on 4-1/2 inch bolt pattern. These both have the wheel and tire included, which you'll need, since…

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Answer 7

I have another option but the smallest 13 inch tire that we offer is a 175/80/13 like the Kenda Karrier #AM10210. The only option to get a smaller tire would be to go to a 12 inch tire like the Kenda Karrier S-Trail ST145/R12 Radial Trailer Tire -…

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Answer 8

It is possible you can just swap out a 4-lug hub with a 5-lug hub so long as you know the hub you need. And in order to determine this (if you aren't sure already), there's a number of things you'll need to know. First, you need to know…

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Answer 9

In terms of speed rating the Goodyear Endurance ST205/75R14 Radial Trailer Tire is certainly superior to the Kenda Karrier #AM10235, as it features an 87 mph maximum speed (compared to 81 mph on the Kenda). Based on your question, where it seems like…

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Answer 10

The 185/80-13 trailer tire size and the 175/80-13 both fit the exact same rim sizes so yes you could go down to the 175 size like the part #TTWTRTM1758013C which is a radial with a higher speed rating of 81 mph.

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Answer 11

Thanks for all of the info on your spindle. The Dexter hub part #8-258-50UC1-EZ that you referenced is the correct fit for your spindle. The bearings match the 1.06 inch diameter and the seal diameter of 1.5 inch matches as well. We do not have a…

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Answer 12

Kenda trailer tires are primarily made in China like most trailer tires. The only Radial trailer tires that I'm aware of that are made in the United States are the Goodyear Endurance line. Carlisle has a bias ply line of tires made in the States,…

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Comparing 175/80-13 And 185/80-13 Tires

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