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Check your trailer tires regularly

For your safety, as well as the reliability of your trailer, it is important to regularly check the general condition of your trailer and tires thoroughly. A good set of tires and a stable load significantly increase road safety.

Tire pressure and tire wear

The tires of your trailer are the only parts, which are in direct contact with the road surface. This also explains why the condition of the tire largely determines the grip and handling of the trailer. In particular, tire pressure and tire tread have a major impact on the safety of your transport vehicle. Therefore, check trailer tires biweekly:

  • Tire pressure
  • Profile depth
  • Irregular wear
  • Cracks in the side walls.

When in doubt, always visit your Hapert Dealer.

Are you in need of new tires?

Why is optimal air pressure so important?

  • Fuel consumption is lower
  • The grip on the road is optimal
  • Slip hazard is significantly reduced
  • Braking distance is optimal
  • Irregularities in the road surface are well accommodated
  • The steering behavior is optimal
  • Increased stability ensures maximum driving comfort
  • Road handling is optimal
  • Trailer tires last longer
  • The chance of a blowout is minimized

The right tension in 5 steps

In 5 easy steps, you can get your trailer’s tires at the right pressure:

  1. Check the tension before you take the trailer on the road, or if you have not driven more than 5 kilometers.
  2. Consult the tire pressure chart and find the correct pressure for your type of trailer. Then set the tire pump to this tire pressure.
  3. Loosen the valve cap of the tire counterclockwise.
  4. Put the pump on the valve. Keep the nozzle straight and well pressed until the belt is at the correct tension and you hear a beep signal. When finished, screw the valve cap back on the trailer tire.
  5. Don’t forget to check the tire pressure of the spare tire.

Checking tire pressure

Proper tire pressure improves handling and increases road safety. With optimal tire pressure, the trailer brakes better, the danger of sway is minimized, tire wear is slowed and the chance of a blowout is significantly reduced. In addition, you drive more economically. So it is essential to check tire pressure regularly.

The tire pressure of your Hapert trailer

The optimal tire pressure for your HAPERT trailer depends on the type of tire. The tire pressure table below outlines the desired tire pressure and maximum load for each type of tire.

Visit your dealer for advice

*The pressure unit Bar is used to indicate tire pressure.

**Pound per Square Inch is a unit of pressure used particularly in the United Kingdom and in the United States.

What's on a tape?

On the side of a tire there is a lot of information about a tire’s construction and properties:

  1. Brand of Band
  2. Profile designations and Tire type
  3. Width of tire in mm
  4. Ratio of tire height to tire width in %.
  5. R= Radial tires and D= Diagonal tires
  6. Diameter dimension of rim in inches
  7. Characteristic for tire load-bearing capacity
  8. Speed category
  9. Tubeless (Tubeless tires)
  10. Production date (XX = Week, X = Year, < = 9. Decade)
  11. Wear index – TWI
  12. Added to tires with increased carrying capacity (Re-inforced)
  13. Note on applicability in winter (on winter and all-year tires) Winter tires are marked with the “M+S” (Mud and Snow) or a similar marking. This not only makes these types of tires recognizable, as being a particular tire type for a particular weather type, it also directly affects their placement in the speed category.
  14. For Trailer Use Only: All of our tires are “trailer use only. This is due to the relatively low maximum speed for which that tire is suitable, which is 140 km/h at most.
  15. DOT number: You can tell the age of trailer tires by the number inside the tire. We call this the DOT number. At the end of this number are four digits, for example: 2514. This means that this tire was produced in week 25 of 2014. Regardless of the degree of use, trailer tires should always be replaced after 7 years from the date of manufacture at the latest.

Measuring tire tread

Due to wear and tear, trailer tires lose tread depth over time. It is required by law to drive with tires that have a tread depth of at least 1.6 mm over the entire surface. You can easily check the tire tread yourself in the following two ways.

TWI Wear Indicator

Several places on the side of the trailer tire show the abbreviation TWI (Tread Wear Indicator), a triangle or the brand logo. Thanks to this wear indicator, a 1.6 mm block, you can see at a glance the extent to which the tires are worn down. The wear limit is reached as soon as the cube is visible.

Tire tread gauge

With a caliper or a tire tread gauge, you can easily measure the tread. Always be sure to measure tread depth in the center as well as on the inside and outside of the tire. In fact, wear on a trailer tire can be skewed. Therefore, the tire tread depth is always determined based on the lowest measured tread.

How old are the tires on my trailer?

In addition to tread depth, there are other characteristics by which you can recognize a damaged tire:

  1. Drought cracks: drought cracks are a sign of aging. Keep in mind that a tire can still look fine after winter storage. Drought cracks are only visible after several miles of driving. So check the tires again afterwards.
  2. Bulging: a bulge on the tire can be caused by hitting a curb or encountering a hole in the road surface while driving. This hits the tire externally, resulting in external and internal damage to the tire. This can damage the tire, resulting in a blowout.