Maintaining proper tire pressure is critical for the safe and efficient operation of a dump trailer. Correct inflation ensures stability, extends tire life, and helps prevent accidents caused by blowouts or uneven wear. Underinflated tires generate excessive heat, wear unevenly, and increase the risk of tire failure, while overinflated tires can reduce traction and create a rough ride. This guide explains the recommended tire pressures for dump trailers and provides a reference table for common load ranges.
Dump Trailer Tire Pressure
| Model/Manufacturer | Tire Size | Load Range | Recommended Tire Pressure (PSI) |
|---|---|---|---|
| Big Tex 10DM | ST235/80R16 | E | 80 |
| Big Tex 12DM | ST235/80R16 | E | 80 |
| Big Tex 14DF | ST235/80R16 | G | 110 |
| Big Tex 16TL | ST235/80R16 | E | 80 |
| Big Tex 22GN | ST235/80R16 | G | 110 |
| PJ Trailers D2 | ST205/75R14 | C | 50 |
| PJ Trailers D4 | ST225/75R15 | D | 65 |
| PJ Trailers D6 | ST235/80R16 | E | 80 |
| PJ Trailers D8 | ST235/75R17.5 | H | 125 |
| PJ Trailers DG | ST235/80R16 | G | 110 |
| Load Trail DD07 | ST205/75R15 | C | 50 |
| Load Trail DD10 | ST225/75R15 | D | 65 |
| Load Trail DD14 | ST235/80R16 | E | 80 |
| Load Trail GD | ST235/80R16 | G | 110 |
| Load Trail GH | ST235/75R17.5 | H | 125 |
| Kaufman Trailers Standard Duty | ST205/75R15 | C | 50 |
| Kaufman Trailers Deluxe 10K | ST225/75R15 | D | 65 |
| Kaufman Trailers Heavy Duty 20K | ST235/80R16 | G | 110 |
| Kaufman Trailers Gooseneck 25K | ST235/75R17.5 | H | 125 |
| MAXXD A6X | ST235/80R16 | E | 80 |
| MAXXD D6X | ST225/75R15 | D | 65 |
| MAXXD D8X | ST235/80R16 | G | 110 |
| MAXXD G6X | ST235/75R17.5 | H | 125 |
| Diamond C LPT | ST235/80R16 | E | 80 |
| Diamond C HDT | ST235/80R16 | G | 110 |
| Diamond C FMAX | ST235/75R17.5 | H | 125 |
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Typical Pressure Ranges for Dump Trailers
Most dump trailers are equipped with heavy-duty tires in load ranges C, D, or E. These load ranges directly impact the recommended tire pressure:
- Load Range C tires often require between 50 and 60 PSI.
- Load Range D tires usually fall in the 65 to 80 PSI range.
- Load Range E tires, which are common on larger dump trailers, often require up to 110 PSI.
Many operators choose to inflate their trailer tires to the maximum cold pressure stamped on the sidewall, especially when hauling heavy loads. This minimizes sidewall flexing, reduces heat buildup, and maximizes safety.
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Why Tire Pressure Matters
Dump trailers often carry heavy loads such as gravel, soil, or construction debris. Tires that are not inflated properly cannot support these loads safely. Running at the wrong pressure affects braking distance, cornering stability, and fuel efficiency. The difference of just a few PSI can make the tires run hotter, which reduces their lifespan significantly.
Cold vs. Hot Tire Pressure
Tire pressure should always be checked when the tires are cold. “Cold” means the trailer has not been driven for at least three hours or has been stationary long enough to return to ambient temperature. As the tires roll, friction and road heat cause air pressure to rise naturally.
If you measure after driving, the reading will be higher than the true baseline. Always set pressures according to the manufacturer’s recommendation when the tires are cold.
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Where to Find the Correct Tire Pressure
The most reliable source of information is the tire’s sidewall, where the maximum cold PSI is printed. This figure represents the highest pressure that the tire can safely handle at its maximum rated load. Some trailers also have a placard near the tongue or inside the fender with manufacturer-recommended pressures. You should never exceed the sidewall’s maximum cold pressure.
Adjusting for Partial Loads
When your trailer is not fully loaded, you may reduce the tire pressure slightly. For example, if a tire is rated for 80 PSI at maximum load but you are carrying half that weight, you might lower the pressure to around 50–60 PSI.
However, keep in mind that underinflation is more dangerous than running at or near the maximum. Many experienced operators prefer to keep their tires close to the maximum recommended PSI regardless of the load for added stability.
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Maintenance Tips
Proper tire pressure is only one part of maintaining safe and reliable dump trailer tires. Here are some additional tips:
- Check weekly: Tires naturally lose air over time, typically 1–3 PSI per month.
- Use a quality gauge: Cheap gauges can be inaccurate by several PSI.
- Inspect visually: Look for bulges, cracks, or uneven wear that indicate improper inflation.
- Protect during storage: Inflate tires to their maximum rating and use covers to shield them from UV rays if the trailer will sit unused for months.
- Rotate tires: If your trailer uses tandem axles, rotate the tires periodically to ensure even wear.
Safety Considerations
The number one cause of trailer tire blowouts is underinflation. Tires that are too soft create excessive flexing, which generates heat and eventually leads to failure.
On the other hand, overinflating beyond the sidewall rating can cause premature wear in the center tread and make the ride harsher. The safest practice is to follow the sidewall recommendation and adjust only slightly if needed.
Final Thoughts
Dump trailers are designed to handle heavy loads, and their tires must be properly inflated to do so safely. Always check your tire’s sidewall for the maximum cold PSI, and use that figure as your reference point. For heavy loads, stick close to the maximum pressure; for lighter loads, you may reduce it slightly but should never allow underinflation.
By maintaining correct tire pressure, checking regularly, and following good maintenance habits, you’ll extend the life of your dump trailer tires, improve fuel efficiency, and reduce the risk of costly accidents or breakdowns. Tire pressure may seem like a small detail, but it plays a huge role in keeping your dump trailer running safely and efficiently.
