What is the Difference Between a ST205/75/D15 and ST205/75/R15 Trailer Tire
Question:
My boat trailer tires are ST205/75D15 and the Kenda Karrier tires you sell are ST205/75R15. Are these tires different in size or same, or similar and how? Thank you in advance for help
asked by: Alan D
Helpful Expert Reply:
The ST205/75D15 tire that you've currently got are the same size as a tire like the Karrier ST205/75R15 Radial Trailer Tire - Load Range C # AM10244, but the difference is that your D15 tire is a bias-ply tire where the Kenda Karrier R15 tires are radial tires. The cords inside a bias ply tire run at a 32 degree angle to the direction of travel, whereas cords on a radial tire run at a 90 degree angle, or across the tire from wheel lip to wheel lip.
This really just means that radial tires are going to flex more, which provides better ground contact, traction, stability, and tread wear. A radial tire will normally run cooler than a bias ply tire, and since cooler tires last longer, radials generally outlast bias ply tires.
The Karrier # AM10244 tires are a load range C tire with a capacity of 1820-lbs per tire, so a set of tires would be ideal for trailers with 2140-lbs or less capacity. There is also a load range D tire available in this size with part # AM10245 and a capacity of 2150-lbs per tire (4300-lbs total with single axle).
I've linked our entire selection of tires that are ST205/75/R15 for you to check out, as well as a helpful article we did on trailer tires that explains more about the differences between various tires.
Products Referenced in This Question
Karrier ST205/75R15 Radial Trailer Tire - Load Range C
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range C
- 205/75-15
- 15 Inch
- M - 81 mph
- Kenda
more information >
Product Page this Question was Asked From
Kenda Karrier ST205/75R15 Radial Trailer Tire with 15" Black Mod Wheel - 5 on 4-1/2 - LR C
- Trailer Tires and Wheels
- Tire with Wheel
- Radial Tire
- Load Range C
- 205/75-15
- 15 Inch
- M - 81 mph
- 5 on 4-1/2 Inch
- Steel Wheels - Powder Coat
- Kenda
more information >
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