Difference Between Trailer Tires ST205/75D14 and ST205/75R14

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Question:

What is the deference between a st205/75D14 and a st205/75R14

asked by: Walt

0

Expert Reply:

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 bias ply type with a Load Range D rating. This size/grade tire has a weight capacity of 2,100-lbs at 65 psi. Lower capacity C- and B-rated tires in this size offer weight ratings of 1,760-lbs at 50 psi and 1,430-lbs at 35 psi, respectively. For example, # AM1ST86 is a Load Range C bias ply tire.

The ST205/75R14 tire is radial type that will typically run cooler than a bias ply and this means it will be likely to last longer. Also a radial tire flexes more than a bias ply tire, giving it better ground contact, traction, stability, and tread wear.

I have linked you to a series of articles on trailer tires and wheels that may be of interest to you. We offer tires and wheels alone, and also pre-mounted tire/wheel combinations, that can be seen on the link provided for you.

expert reply by: Adam R

0

Capt B.

11/11/2021

I have had no good luck with Kenda or Good year trailer tires. Constant blow outs at highway speeds on my tandem axle boat trailer, Tire with less than 400 mile & less than 6 months old. I am considering a light truck tire instead of a trailer tire

Les D.

11/15/2021

If you are having constant tire failures on your trailer, it will have nothing to do with the tire brand. I recommend that you use Special Trailer (ST) tires for a trailer and Light Truck (LT) tires for a light truck. ST tires are designed for trailer needs with stiffer sidewalls. Causes of trailer tire failures include, 1. Tires that become over heated from not having the recommended air pressure, 2. Also over heated from having a tire air leak, 3. Tires that become overheated from being overloaded with weight, 4. Tires that have cracked or damage rubber from age or bad roads, 5. Tires that are damaged from badly installed components like crooked/bent axles that cause excessive wear very quickly. I recommend examining your blown tires to determine the cause of the blowouts.

Capt B.

11/15/2021

@LesD FYI: I have had 4 blowouts this year with Kenda ST205/75 R 14 C & D rated. The tires have had between 350 to 850 miles on them & with a mfg. date of late 2020 or 2021. No idea why they are blowing out. Even the company doesn't know why. Ironically I have 15 year old Kenda tires that are still mounted on the original rims holding air, although they are well tread worn. ???????????????? Capt. Bill Bennett

Capt B.

11/15/2021

@LesD Follow up QuestionsADD COMMENT I have had no good luck with Kenda or Good year trailer tires. Constant blow outs at highway speeds on my tandem axle boat trailer, Tire with less than 400 mile & less than 6 months old. I am considering a light truck tire instead of a trailer tire Is there a higher rated tire than D for 14" rim? Capt. Bill

Ronald

4/14/2024

Thankyou, My trailer will just sit in the parking lot. I do not take it on the road except to service the boat a couple of miles away. Will the ST205/75D14 be ok?

Answer 1

Hey David, we don't have a ton of options that have the Goodyear Endurance ST205/75R14 mounted like the part #GY57QB and the Liger part #LH55VR. These would be a great option for you and I would just go with whichever you think has the nicer…

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Answer 2

First you will need to remove the old hydraulic equipment. Remove the surge coupler or actuator, remove all the lines, and finally remove the brake assemblies. If you have 10 inch diameter hub and drums, you may need to replace those as well. If you…

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Answer 3

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 4

Hey Billy, our trailer wheel and tire combos like the part #WST67FR are not generally balanced because for most people it doesn't really make a difference. So this combo is not balanced. Now if you wanted to balance this you could pretty easily…

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Answer 5

Excellent question. There is no disadvantage to using a special trailer tire with a higher weight Load Range Rating than is required by your trailer's weight. Doing so simply means that those higher-rated tires will tend to run cooler, since they…

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Answer 6

You'll want to keep your 205/75-14 Load Range C tires fully inflated to the 50 psi pressure rating listed on the sidewall. The tires will only have the stated capacity when fully inflated. If they are not fully inflated, the tire's load…

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Answer 7

For your 2018 Rockwood Mini-Lite travel trailer, the Karrier ST205/75R14 Radial Trailer Tire - Load Range D #AM10235 are my recommendation for you. These radial tires have a Load Range D rating and are rated for 2,200 lbs at 75 psi each with a speed…

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Answer 8

Correct, a 205/75-R14 trailer tire will be better in most areas than a 205/75-D14 trailer tire. The "R" stands for radial which is best for use on the highway and the "D" stands for bias which is best for use off-road. For a…

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Answer 9

I can certainly help you out with that. If you just need replacement ST205/75D14 tires for your utility trailer then I recommend the Loadstar ST205/75D14 Bias Trailer Tire - Load Range C #AM1ST86. These are rated at 1,760 lbs each, translating to…

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Answer 10

Hey Don, The Loadstar ST205/75D14 Bias Trailer Tire with 14" Galvanized Wheel - 5 on 4-1/2 - Load Range C #AM3S450 would be the correct fit but I would double check the load range on your current tires. If you find you have a load range D…

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Answer 11

You can potentially switch from ST205/75R14 tires and wheels to ST205/75R15 tires and wheels but you first need to make sure that there is enough clearance all around the existing tires for the larger size. The 14s that you have now are abut 26.3…

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Answer 12

You are safe staying with your Westlake ST235/75R15 Radial Off-Road Trailer Tire #WST54FR as long as it is not damaged or showing signs of dry rot due to sun damage. As this tire has a radial construction it will perform well on the highways. It is…

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Difference Between Trailer Tires ST205/75D14 and ST205/75R14

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