Recommended Tire Pressure for ST225/75-15 Trailer Tires

Question

Question:

I have tire st 225/75d15 65 lbs max should they be 65? there at 40 now

asked by: Rick

0

Expert Reply:

Trailer tires should be kept inflated to the maximum pressure listed on the tire sidewall, as opposed to passenger vehicle tires that will have a certain acceptable range. If a trailer tire is inflated to a lower air pressure than the recommended maximum, the amount of weight that the tire can carry will be lowered. If a heavier load is put on the trailer tire than what is recommended for that air pressure, the sidewall of the tire could heat up and cause the tire to fail.

I'll link you to our trailer tire FAQ article that has additional information about trailer tires.

expert reply by: Mike L

0

Gary

6/17/2020

I have the same tires, I was told to fill tires slightly less than max to allow for tires adjust to hot temperatures. psi expansion I was told...

Walter S.

9/22/2025

Hey, expert Mike L, I followed your "inflated to the maximum pressure" advice (max 80 psi on sidewall), and now I'm sitting on side of road, waiting for a tow truck to fix my blown tire. Do NOT inflate to max on sidewall unless you enjoy changing tires or waiting for a tow truck. ??

Answer 1

It sounds like there is an electrical short on your trailer wiring that is activating your left rear brake assembly and that is why the brake continues to drag and get hot. Since you have swapped the brake assembly out and still had the problem you…

view full answer...

Answer 2

I can end this debate for you real fast! Trailer tires, which will have an ST in front of the size, should always be inflated to the maximum psi indicated on the tire. Trailer tires usually do not have a recommended and maximum psi indication so I am…

view full answer...

Answer 3

The proper tire pressure at all times is the max pressure listed on the side of any trailer tires. Trailer tires are rated for weight capacity and designed to function based on that maximum tire pressure. The tires should be inflated cold, meaning…

view full answer...

Answer 4

The Westlake ST225/75R15 Radial Trailer Tire w/ 15" Silver Mod Wheel - 6 on 5-1/2 - Load Range E #LHAW124 should be inflated to 80 psi when cold. It is great that you do use a TPMS like #TST-507-FT-4-C that monitors both tire pressure and…

view full answer...

Answer 5

In this instance, the tire pressure should be maintained at 65 PSI. Unlike tires on a passenger vehicle that might have an acceptable range of tire pressures, trailer tires should always be ran at the maximum pressure listed on the tire sidewall.…

view full answer...

Answer 6

We recommend that all trailer tires be inflated to the max psi stated on the sidewall of the tire. If the tire is under inflated, the weight capacity is lowered to an unknown amount for that tire. Although running lower air pressures can improve the…

view full answer...

Answer 7

For a load range E trailer tire like the Provider ST225/75R15 Radial Trailer Tire #TR225LRE, we normally recommend inflating them to the maximum cold psi, which on this tire is 80, like you mentioned, as this will give you the best performance,…

view full answer...

Answer 8

A trailer tire should always be inflated to its maximum psi when the tire is cold. The maximum psi for a specific tire will be listed on the tire wall and may be different from manufacturer to manufacturer. Even on the same size tire. Occasionally…

view full answer...

Answer 9

If you install new 225/75-15 tires on your trailer or any trailer for that matter with a load range E rating like part #LHWL304 for example then you will need to fill them to the max psi listed on the sidewall which for this tire is 80 psi. This will…

view full answer...

Answer 10

The Westlake tires ST205/75R15 trailer tires should be inflated to the max psi listed on the sidewall of your tire. The Westlake ST205/75R15 Radial Trailer Tire - Load Range D #LHWL300 we carry should be inflated to 65 psi cold. Ideally you would…

view full answer...

Answer 11

45 PSI is as low as you can go per tire for a 3,800 lbs trailer. The Goodyear Endurance ST225/75R15 Radial Tire item #LH33FR, you were looking at, is a load range E tire with a maximum capacity of 2,830lbs at 80 PSI per tire. The air pressure can be…

view full answer...

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…

view full answer...

Recommended Tire Pressure for ST225/75-15 Trailer Tires

Product Page this Question was Asked From

Featured Help Information

Miscellaneous Media

Continue Researching