Key takeaways
- When carrying a full load, use the higher fully laden tyre pressure listed on your door placard or in the handbook.
- The laden figure is usually a separate column from the everyday one and often raises the rear pressure most.
- Check pressures when the tyres are cold, before loading and setting off, for an accurate reading.
- Reset to the normal pressure once the load is gone, or the tyres run over-inflated and wear the centre.
- Correct laden pressure protects grip, braking and tyre life and guards against overheating on a long, heavy drive.
A car packed for a holiday, a tip run or a family trip weighs far more than it does on the daily commute. That extra weight presses down on the tyres, and the everyday pressure is no longer enough to support it. Most cars have a separate, higher pressure for exactly this situation. This short guide explains when to use the laden figure, where to find it, and why resetting afterwards matters.
What tyre pressure should a fully loaded car use?
A fully loaded car should use the higher laden tyre pressure listed on the door placard or in the handbook, not the everyday figure. Most cars provide two settings: a normal pressure for light use, and a fully laden one for a full car, heavy boot or motorway driving. The laden figure supports the extra weight and is usually raised most at the rear.
The manufacturer has already calculated the right pressure for a full load, so you simply switch to that column when the car is heavily laden. The sidewall number is the tyre's maximum, not your target, so always use the vehicle's recommended laden figure. Set it before you set off, while the tyres are cold.
When does a car count as fully loaded?
A car counts as fully loaded when you are near its passenger and luggage capacity: a full set of passengers, a packed boot, a roof box, or any combination that adds significant weight. Holiday trips, house moves, tip runs and towing all qualify. As a rule, if the car is noticeably heavier than your daily driving, switch to the laden pressure.
You do not need to fuss over a single extra passenger or a few bags. The laden figure is for genuinely heavy loads where the everyday pressure would leave the tyres working too hard. When in doubt on a long, fully packed motorway trip, the higher figure is the safer choice. Our guide on how to check your tyre pressure explains where the two figures are listed.
Where do you find the laden pressure?
The laden pressure is on the same placard as the standard figure, usually inside the driver's door shut, on the fuel filler flap, or in the owner's handbook. It is typically shown as a second column or row, often labelled for full load, maximum load or high speed. The figures are given in PSI or bar, sometimes both.
| Situation | Which pressure |
|---|---|
| Everyday driving, light load | Standard recommended pressure |
| Full car, packed boot or roof box | Higher fully laden figure |
| Long motorway trip when loaded | Fully laden figure, checked cold |
| Towing a caravan or trailer | Fully laden figure, plus the trailer's own |
| Load removed | Back to the standard pressure |
If your placard lists pressures by speed as well as load, match both to your trip: a heavily loaded, high-speed motorway run uses the highest figure shown. When the markings are unclear, the handbook spells out which column applies to which use.
Why does load change the right pressure?
Load changes the right pressure because more weight needs more air to support it without the tyre flexing too much. An under-inflated tyre under a heavy load flexes more, runs hot and wears at the edges, and in extreme cases can fail. Raising the pressure to the laden figure keeps the tyre's shape, spreads the load and controls the heat.
This matters most on long, fast, fully packed journeys, exactly the holiday motorway trips where a failure would be most dangerous. The laden pressure also keeps the car handling and braking predictably, since a squashed, under-inflated tyre grips and steers less precisely. A few minutes with a gauge buys real safety on a heavy trip.
Do you need to reset the pressure afterwards?
Yes. Once the load is gone, return the tyres to the standard pressure, or they run over-inflated for everyday driving. Over-inflation shrinks the contact patch, reduces grip, gives a harsher ride and wears the centre of the tread faster. The laden figure is only right while the car is actually carrying the load.
It is easy to forget this step after a holiday, then drive for weeks on too much pressure. Make resetting part of unpacking: when the luggage comes out, drop the tyres back to normal. If you tow or carry heavy loads regularly, you will get used to switching between the two figures as your load changes.
Getting set before a heavy trip
Setting the right pressure is one item on a wider pre-trip check. Our tyre safety checklist before a long drive covers tread, condition and the spare alongside pressure, and how to check your tyre pressure shows the method and where the laden figures live. If a tyre looks worn or damaged before a loaded journey, do not risk it: Fast Tyre brings mobile tyre fitting to your home, work or roadside across London and central England, so you set off properly prepared for the weight you are carrying.
Frequently asked questions
Use the higher fully laden pressure on your door placard or in the handbook, not the everyday figure. Most cars list a separate setting for a full load, often raising the rear pressure most. The laden figure supports the extra weight and keeps the tyres from overheating.
On the same placard as the standard figure, usually inside the driver's door shut, on the fuel filler flap, or in the handbook. It appears as a second column or row, often labelled full load, maximum load or high speed, in PSI or bar.
If the car is near its capacity, with a full set of passengers and a packed boot, yes, switch to the laden pressure. You need not adjust for one extra person, but genuinely heavy loads need the higher figure to support the weight safely and avoid overheating.
Yes. Return the tyres to the standard pressure once the load is gone, or they run over-inflated for everyday use. Over-inflation reduces grip, harshens the ride and wears the tread centre faster. Make resetting part of unpacking so you do not drive for weeks on too much pressure.
More weight needs more air to support it without the tyre flexing too much. Under load, an under-inflated tyre flexes, runs hot, wears at the edges and can fail. Raising to the laden figure keeps the tyre's shape, spreads the load and controls heat on long, heavy trips.
No. The number on the sidewall is the tyre's maximum pressure, not your target. Always use the vehicle's recommended laden figure from the door placard or handbook, which is set for your car and load. The sidewall maximum would over-inflate most cars.