What is the correct tire pressure for trucks and trailers?

Truck tire pressure has a huge impact on safety, driving economy, and tire durability. What's the right tire pressure for a truck? How can you determine the correct tire pressure to avoid damage and increased fuel consumption?

Why is correct truck tire pressure so important?

Properly adjusted truck tire pressure is key to long tire life and optimal fuel consumption. Underinflating truck tires can lead to tire overheating, deformation, and even damage to the rim or suspension. Conversely, overinflating increases the risk of cracks and uneven tread wear. Therefore, it's important to ensure the correct tire pressure for your truck's model and load.

What tire pressure should you use for your truck and trailer? Universal guidelines

Proper tire pressure for truck tires depends on the vehicle type, axle, load, and wheel configuration (single or dual). Below are some general guidelines that can be used as a reference. For more detailed information, check the tire sidewalls or your vehicle's service manual.

• Tractor units (e.g. trucks):
  • for the leading axle the pressure corresponds to the axle load, e.g. 7.5 tons = 7.5 bar, 8 tons = 8 bar;
  • on the rear axle, standard 9.0 bar, unless the manufacturer recommends otherwise;
  • in a twin configuration (B) may require adjustment depending on the load.
• Semi-trailers and trailers:
  • for a single axle with a load of 7.1 tonnes, 8.5 bar is recommended, and for 7.5 tonnes also 8.5 bar;
  • in semi-trailers it usually oscillates around 8.5-9.0 bar, but always check the manufacturer's data.
• Buses and coaches:
  • on the front axle (PK) in a single arrangement usually 7.5-8.0 bar, on the rear (TK) twin axle even up to 9.0 bar.

These values are just a starting point. To precisely determine the ideal tire pressure for a truck or trailer, always refer to the vehicle's specifications.

How to check and adjust truck tire pressure?

To determine the correct tire pressure in your truck, you need reliable tools. Workshop equipment should include pneumatic tools and air pressure sensors that facilitate precise measurements. Regular tire pressure checks for trucks should be standard—ideally before every long trip and when the load changes. This includes:

• check the markings on the tire – they contain information about the maximum pressure and load;
• consult the pressure table – universal values are only a guide, the data from the vehicle manufacturer is crucial;
• adjust the pressure to the conditions – e.g. a heavier trailer load requires higher pressure in the truck tires;
• use the right equipment – at Autos automotive store you will find everything from pumps to truck parts .

Too low a tire pressure in a truck tire leads to excessive wear on the sides of the tread, while too high a pressure in the center of the tire causes excessive wear. Both scenarios shorten tire life and increase the risk of failure. Incorrect tire pressure in a truck tire can also damage other components, such as the suspension or rims.

Where to find the right tires and support?

If you need new tires or maintenance accessories, visit our Autos store and choose tires for your truck and construction equipment . Our professional truck service will help you choose the correct tire pressure and ensure the health of your vehicle. Regularly checking your truck tire pressure and using the professional tools available in our store is a recipe for safety and savings.