Can a Load Range C Tire Be Replaced with a Load Range D Tire
Updated 08/25/2025 | Published 06/25/2018
Question:
I recently replaced my C rated tiresST205/75R14/Cwith ST205/75R14/D tires which raised the max cold PSI from 50 psi to 65 psi. I have heard several different recommendations on which tire psi to use. Some say use the max cold pressure of 65 psi all the time, others say use less or equal to the original max tire pressure of 50 psi, and others say use a psi based on the Goodyear load/inflation chart which appears to be based on the max rating of each axle. If my max trailer rating is 1760 per tire for the Casita and the recommended original tire pressure was 50 psi, should I use 50 psi for the new tires regardless of the cold psi rating of 65 or can I run the tires at the 65 psi if the trailer loaded weight is at or below the max of 1760 per tire? Would using less than the 65 psi for the D tire cause any tire damage? Thanks
asked by: Jack
Helpful Expert Reply:
Yes, you can replace your load range C tires with load range D tires without issue. It will only become any issue when you go down load ranges, not up. The tires will have the same overall diameter as long as they are the same size regardless of their load range. If you are looking for a recommendation on a 205/75-14 tire I recommend the Karrier ST205/75R14 Radial Trailer Tire part # AM10235.
This tire has a radial construction which is better for long highway hauls, a load range D rating which is 2,200 lbs per tire, and a speed rating M which is suitable for use up to 81 MPH. Kenda is our best tire manufacturer and they come with a two year warranty. I have attached a review video for you.
Bill W.
8/24/2025
Have 4 tires on a boat trailer, ST205/75R14 Load C. I routinely blow ATLEAST 1 tire a season. Want to go up to Load D but can’t afford to do all 4 right now. I’m told I can mix Load C and D’s together as long as they’re on the SAME AXLE. That way I only need to buy 2 Load D’s until I can get the other 2. True?
Nick S.
8/25/2025
Nick S.
8/25/2025
Product Page this Question was Asked From
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 >
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on Trailer Tires and Wheels
Jack
6/25/2018
I recently replaced my C rated tiresST205/75R14/Cwith ST205/75R14/D tires which raised the max cold PSI from 50 psi to 65 psi. I have heard several different recommendations on which tire psi to use. Some say use the max cold pressure of 65 psi all the time, others say use less or equal to the original max tire pressure of 50 psi, and others say use a psi based on the Goodyear load/inflation chart which appears to be based on the max rating of each axle. If my max trailer rating is 1760 per tire for the Casita and the recommended original tire pressure was 50 psi, should I use 50 psi for the new tires regardless of the cold psi rating of 65 or can I run the tires at the 65 psi if the trailer loaded weight is at or below the max of 1760 per tire? Would using less than the 65 psi for the D tire cause any tire damage? Thanks