What PSI should travel trailer tires be?

In this article, we will answer the following question: What PSI should travel trailer tires be? Trailers do not have the same characteristics as “classic cars”. In particular, you will notice a glaring difference in the tire models as well as the requirements in terms of weight and balance. Let’s see more details below. 

What PSI should travel trailer tires be?

For travel trailers, it is recommended to have a maximum of 85 PSI.  Usually, caravans and trailers (new or used) have an owner’s manual that specifies the ideal tire pressure level. Even used trailers have a plate indicating the correct inflation level.

To calculate the average pressure of a travel trailer tire, simply note:

  • the tire size code,
  • the load index.

Regarding the inflation pressure of a trailer tire, the relevant information is mentioned on the sidewall of the tire. It is very important to remember that the pressure adjustment must be done cold, that is to say when the vehicle has been stationary for several hours.

In cold weather, 0.2 bar should be added to the pressure level. For 450 x 10 trailer tires, for example, a pressure of 3.1 kg / 3.04 bar is recommended.

Factors affecting the pressure of the trailer tires

With standard vehicles, tire pressure is relatively straightforward. Just check the tires and inflate them accordingly. With caravan and trailer tires, there are other factors to consider.

At the top of the list are weight and load pressure. This is because you need to determine the correct PSI for each tire, based on the load. The load weights of these vehicles vary depending on the make and model.

Another point to consider: the number of axles. With multiple axles, the pressure ratings may vary. Due to its size and the length of its axle, a Class A caravan has the same characteristics as a semi-trailer. This means that it will balance and behave differently than a Class C motorhome. Its smaller tires also require different pressures and balancing.

What are the consequences of an under and over-inflated trailer tire?

Never exceed the load and pressure requirements marked on the tire wall. It is also necessary to take into account:

  • cold and hot pressing,
  • the appropriate pressure during winter,
  • the correct pressure when driving on a motorway.

If the required pressure is 64 PSI, you will not inflate your trailer tires beyond 54 PSI. Indeed, too high pressure can cause a puncture or worse, a burst. Too much air also causes a rash. This is because the pressure weakens the material of the tire.

Under-inflated tires also pose huge risks. For example, you risk quickly wearing out your tires. Expect a dramatic increase in your fuel consumption as well. That’s not all! Low tire pressure leads to increased sidewall flex, which will affect the stability of the trailer.

Another thing to avoid: adjustments in extreme conditions. Why? Quite simply because air can expand and contract depending on the temperature. In fact, in extreme thermal conditions, it is very difficult to inflate caravan or trailer tires with great precision.

Avoid adjusting your tire pressure when it is extremely hot or cold outside. Likewise, don’t let air out if the pressure seems high in hot weather. It can also damage the tire.

Cold pressure is recommended if and only if the caravan or trailer has not been driven for more than 2 hours. As regards the hot pressure, we will base ourselves on the over-inflation technique of + 0.3 bar compared to the manufacturer’s instructions.

Small precision: you should never deflate a hot tire. The consequences could be dire.

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The ideal trailer tire pressure during winter and on highways

To ensure excellent road holding and optimal driving comfort, when winter is on its way, + 0.2 bar must be added to the pressure indicated by the manufacturer in order to take into account the contraction of the air.

If your vehicle travels on the motorway for more than 2 hours, add the pressure of + 0.3 bar to that indicated by the manufacturer.

Where to check the pressure of your trailer tires?

To prevent the tire of your caravan from bursting and to ensure good handling for your vehicle or trailer, you must pay special attention to your tire pressure. You can check your tire pressure at all service stations and auto centres.

Good news! In the case of low pressure, inflation is free. On the other hand, it should be noted that at night, some stations remove the hoses from their inflators. To obtain the ideal pressure, therefore, remember to check your tire pressure before your departure or during opening hours.

Why do my trailer tires keep blowing out?

There are many possibilities why your trailer tires keep blowing out, but the most common reason is always the result of heat build-up. Typically, a crack in a tire and its tear results from improper use or wear. The most common reasons are:

  • a pipe with too low air pressure (75% of cases);
  • a collision with a hard or sharp object (stone, brick, bottle, etc.);
  • overloading the vehicle which leads to overheating of the tires;
  • air pressure greater than the range of values ​​provided by the manufacturer;
  • excessive wear or duration of use;
  • a manufacturing defect – usually revealed within the first thousand kilometres driven;
  • driving with a failure of the braking system causing the wheel to overheat.

The explosion of a tire on a steering axle in a loaded delivery vehicle, motorhome, bus, truck or semi-trailer with a trailer almost always results in loss of control and can be particularly dangerous. The profile height of the tire worsens the inclination of the vehicle, the large mass of which increases the pulling force to the side.


Maintaining a travel trailer is not easy and time-consuming, of course. But, this vehicle allows you to live pleasant moments in the company of those who are dear to you, whether in your hometown or abroad. It is reasonable for you to take care of it!

A travel trailer can last up to 10 years, on average. However, the lifespan of a vehicle can vary considerably taking into account some essential aspects such as: how often you drive it if you live full-time in the trailer or not, if you do regular annual maintenance, if you take precautions when parking it long-term and in time what are you on the road.

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FAQ on What PSI should travel trailer tires be?

What are the worst travel trailers to buy?

The following are considered the worst travel trailers to buy:

  • Hurricane.
  • Coachmen.
  • Jayco.
  • Coleman.
  • Keystone.
  • Winnebago.
  • Fleetwood.

What is the most reliable travel trailer brand?

The most reliable travel trailer brands are:

  • Airstream.
  • Winnebago.
  • Forest River.
  • Jayco.
  • Keystone.
  • Oliver.
  • Happier Camper.

Do travel trailers hold their value?

Travel trailers do hold their value longer than RVs or caravans. A travel trailer can hold its value between five and 15 years, more or less regularly. 

Which brand is better, Michelin or Pirelli?

The Pirelli works the same as the Michelin, but the touch is more inert and therefore less attractive. The third fastest are the Dunlops. Effective, although not very pleasant: it is best to ignore the squeaks and the soft steering feel and mistreat them to get through all the vertices.


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