Comparing Special Trailer Tires in Size ST205/75-14 with Differing Load Range Ratings
Question:
Which is better trailer tire 205 75D 14 or 205 75C 14?
asked by: Andrew
Expert Reply:
The only actual differences between two special trailer tires in the same size but with different weight load range letter codes, C and D in this case, are their weight carrying limits in pounds and their required inflation pressures in psi. For reference, the linked page displays all of our special trailer (ST type) tires in size ST205/75-14.
These tire options include items with either radial or bias ply construction and tires in either Load Range C or D. As examples, Kenda # AM10234 is a Load Range C, meaning good to 1,925-lbs at its 60-psi inflation pressure; or the Load Range D tire # AM10235 is good to 2200-lbs at its rated 75-psi pressure.
The benefit of using tires that can handle more weight than you're actually putting on them is that they will tend to run cooler. Tires used near their limits naturally tend to run hotter, and this heat is the root cause for much trailer tire failure. By selecting tires that offer a good safety margin in their weight rating you build in some insurance, so to speak.
The other main causes for undesirable heat build-up in a tire are incorrect inflation pressure (either too low or too high) and operating the tire at speeds higher than that for which it is rated. Some special trailer tires, such as D-rated # AM10235, are rated for highway speeds up to 81-mph. If you routinely drive at 70 to 75-mph on the interstate, then you really want to use tires rated for higher speed. If we do not specifically call out a speed rating in a tire's specs, then that means its speed rating defaults to 65-mph. Of course, it is never a good idea to run tires at higher speeds than what they are intended to handle.
Any brand, type or rating of special trailer tire will last longer if you always observe rated weight, pressure and speed.
Products Referenced in This Question
Karrier ST205/75R14 Radial Trailer Tire - Load Range C
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range C
- 205/75-14
- 14 Inch
- M - 81 mph
- Kenda
more information >
Karrier ST205/75R14 Radial Trailer Tire - Load Range D
- Trailer Tires and Wheels
- Tire Only
- Radial Tire
- Load Range D
- 205/75-14
- 14 Inch
- M - 81 mph
- Kenda
more information >
Product Page this Question was Asked From
Loadstar ST205/75D14 Bias Trailer Tire - Load Range C
- Trailer Tires and Wheels
- Tire Only
- Bias Ply Tire
- Load Range C
- 205/75-14
- 14 Inch
- Kenda
more information >
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