Trailer Tires 205/75-15 To Replace 205/65R15 Tires Installed On a Utility Trailer

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Question:

Need to replace my trailer tires. They have had a slow leak on both tires for years and i dont even know if they are trailer tires. Tire model is Wynstar R21 tire size is 205 65R 15 24HR M/S. I cant really find any info on this tires size. Maybe they are wrong size i dunno. I would like to replace these with proper trailer tires. Cant really find any other info on trailer payload or weight rating. I think the wheels are fine but i dont really know. Ive attached a picture

asked by: Brian

1

Helpful Expert Reply:

The tires you have Wynstar R21 tire size is 205 65R 15 24HR M/S, are vehicle tires and not designed for trailer use. The wheels that you have do appear to be trailer style wheels as they appear to have 0 offset. A vehicle wheel will generally have an offset that allows the wheel face to sit closer to the outer edge of the tire.

You should be able to replace your current tires with a 205/75-15 tire size as it appears that you have plenty of clearance inside your fenders. The 205/75-15 is going to be the same width but will be 1.6" taller in diameter or roughly 3/4" taller off your current tread. Depending on where you use your trailer will decide if you want Bias or Radial tires. Radial tires are better for on road use while bias tires are better when you trailer is to be used off road. You can decide what weight rating will work best as I will give you multiple options for each radial and bias tire construction.

Karrier ST205/75R15 Radial Trailer Tire maximum load capacity of 1,820lbs(Load Range C). # AM10244

Provider ST205/75R15 Radial Trailer Tire maximum load capacity of 2,150lbs(Load Range D). # TR20515D

Loadstar ST205/75D15 Bias Trailer Tire maximum load capacity of 1,820lbs(Load Range C). # AM1ST92

expert reply by: Bud M

1

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Answer 1

Both trailer tire sizes you reference, ST205/65-15 and ST205/75-15 share the same width (8-inches) but have different overall diameters. So you will want to insure that your trailer wheel wells/fenders have enough clearance for the larger tire. At…

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Answer 2

The P205/65R-15 tires you mentioned are passenger car tires, which is why you couldn't find then on our site. Because trailer tires are manufactured with stronger sidewalls they're better suited for handling the vertical loads they'll…

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Answer 3

We offer 15" diameter wheels in five different bolt patterns; 4 on 9.44" (uncommon), 5 on 4-1/2" (common), 5 on 4-3/4" (uncommon), 5 on 5" (semi-common), and 6 on 5-1/2" (common). In order to determine which bolt pattern…

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Answer 4

You are definitely doing the right thing by changing out passenger car tires and putting trailer tires on your trailer. Trailer tires have a sidewall that is a little more rigid and so they can handle the weight of trailers and their cargo much…

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Answer 5

As long as you have the fender and sidewall clearance for a slightly larger tire, you should not have any issue upgrading a bit from the 195/65-15 size tires you currently have mounted. You will also just need to make sure that any new tires you…

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Answer 6

For a trailer tire, the narrowest option rim for any given tire is going to be the best option. For a 205/75-15, the best option would be a 5 inch rim. The reason that narrower is better is because it provides more support for the tire. Since trailer…

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Answer 7

While physically possible you should never run a tire size that starts with the letter P on a trailer as it was not intended for use on a trailer. It was designed for a passenger vehicle which is a totally different application. You really need to…

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Answer 8

Trailer tires typically have a lifespan of 5 to 6 years. This means that no matter how good the tread depth may be, no matter how few dry rot cracks you might see in the sidewall, you'll want to consider replacing the tires when they reach this…

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Answer 9

For a trailer you will want to use tires that are ST rated. P rated,or passenger rated, tires are not designed to carry weight like a trailer does and should not be used on a trailer at all. The sidewalls are constructed differently and will be more…

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Answer 10

I looked up the owners manual for the 2014 Ford F-150. On a 4x4 SuperCrew with the 3.5 liter EcoBoost, 145 inch wheelbase, and 3.55 rear end the gross combined weight rating will either by 13,400 pounds (for limited models) or 15,500 pounds. If you…

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Answer 11

The 4-way on your trailer is what's known as a wishbone connector like part #A35W42B. Two of the wires are the running light circuit which is a little easier to install since you can run one down each side of the trailer. This way you don't…

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Answer 12

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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Trailer Tires 205/75-15 To Replace 205/65R15 Tires Installed On a Utility Trailer

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