Hi and welcome to the Loughborough Refurbs Fast Fit Centre.
On this page, we would like to give you some information about tyre pressure.
That's why tyre pressure is so important
On the tyre loads all the weight of your car, including occupants and cargo. The main element is the air. That's why the right tyre pressure is crucial for the driving behaviour of your car - and thus for your safety. It also has a significant impact on fuel mileage and tyre life.
An elevated pressure of up to 0.3 bar is seen by professional as unproblematic. It should not be more, because the tyre warms up during the journey and the pressure increases again by 0.2 to 0.3 bar. And that means increased fuel consumption, faster tyre wear.
Harmful and more dangerous than too high pressure, however, is too low tyre pressure. This is the unanimous opinion of experts. Already 0.2 bar less air in the tyre affects the mileage and the fuel consumption. At a constant 0.4 bar too little, the wear even increases by a considerable 30 percent! Apart from that, the structure of the tyre is affected, in addition, the braking distance is sometimes extended enormously.
Where to find the information about the right tyre pressure
The optimum tyre air pressure, both for summer tyres and for winter tyres, is specified by the automaker. You will find the information about the right tyre pressure:
• in the manual
• inside the driver or passenger door
• on the inside of the tank lid
• on a sticker in the glove box
• in tyre pressure tables of the tyre manufacturers
Normally manufacturers quote four values: the partial load pressure and the full load pressure for the front and rear tyres respectively.
Part-load pressure is intended for normal driving when the car is not fully loaded and you are not driving at high speeds. You need full-load printing when your car is fully occupied and loaded and you drive at high speed over a longer distance - for example on a holiday trip with the whole family. After such trips, reduce the tyre pressure to partial load.
The information in the manual always refers to the tyres that are noted in the registration certificate of your car. If you drive other technically approved special tyres (such as wide tyres) with a different speed index or load index, tyre pressure will be based on information provided by the tyre manufacturer.
When should the tyre pressure be slightly higher?
• during long journeys on highways
• and at steady speeds
• when the vehicle is fully loaded
• on longer trips on gravel roads
What should be considered for caravans and trailers?
If the vehicles have not been moved for a long time, it is especially important to check the tyre pressure before driving. For the right pressure, you should also stick to the manufacturer information here. If these are not available, experts recommend a tyre pressure of 3.0 bar for cold tyres.
Wrong tyre pressure: These are the most common consequences
Poor grip: You can spin more quickly, especially on bends, because grip and directional stability are reduced.
Longer braking distance: They only come to a standstill several meters later.
Bursting tyres: The tyre is roughed and heats up. It can lead to tyre damage such as a crack.
Earlier wear: If the tyre is not even, lower the tyre faster on the outside or in the middle.
Higher fuel consumption: As the rolling resistance increases, your vehicle consumes more fuel. This also increases the exhaust gas values.
So check and measure the tyre pressure
No tyre is safe from pressure loss, they all lose air over time. It is therefore essential to measure regularly and to correct it if necessary.
Check the tyre pressure regularly, preferably every 14 days, but at least once a month.
A weekly test is recommended during the change of the seasons, because with warmer outside temperatures, the pressure increases, with colder temperatures it sinks.
Always measure the air pressure when the tyre is cold. You should not have driven for more than five miles at a moderate pace.
Do not forget the spare tyre! Also occasionally check its tyre pressure. So you are always prepared for emergencies.
The pressure technique: control systems, valves, tyre gas
Tyre Pressure Monitoring Systems
Since November 2014, all newly registered cars and motorhomes in the EU must be equipped with a tyre pressure monitoring system (TPMS). These different systems depending on the manufacturer warn the driver if the tyre pressure is wrong.
Tyre pressure monitoring systems work differently: In so-called direct systems, all tyres are equipped with their own pressure sensor. Indirect systems detect the pressure on the tyres via the ABS or ESP sensors. If the TPMS gives a warning message, you should go to a petrol station, check the tyre pressure and correct if necessary.
TPMS have the advantage that the driver has the condition of his tyres constantly in view. However, with tyre pressure monitoring systems the tyre change is more complex and expensive.
Would you like to retrofit your older car with a tyre pressure monitoring system? That is not a duty by law.
But we at Loughborough Refurbs can certainly do it for you in a very short time and at a very good price.
You must know that about valves
They are small but have an extremely important job. That's why you should always keep an eye on your valves: for example, if the air pressure is too low every time you check, it could be due to a damaged valve.
Check the valves regularly for damage or heavy contamination.
Replace the valves with every tyre change. In our Loughborough Refurbs workshop, this will be done automatically, as the valve change is also strongly recommended by the tyre manufacturers.
• Simple rubber valves are only suitable for tyres with a maximum pressure of 4.5 bar.
• Renew the valves every four years at the latest.
• Always unscrew the valve cap. It protects the valve from dirt, dust and water.
Is tyre gas worth it?
In addition to tyres filled with compressed air, many garages also offer tyres with so-called "tyre gas", which uses nitrogen. This type of filling is used, for example, in racing cars, aeroplanes and dangerous goods transport, where the tyres are exposed to extreme loads and increased safety is required, especially with regard to the risk of fire.
But even with an ordinary car, tyre gas can be used. The advantage of this is primarily that the pressure in the tyre remains constant - because, with heat, this gas expands less. Also, it should stay in the tyre longer than air.
A gas filling for all four tyres costs good money - an investment that in the opinion of experts such as automobile clubs, is not worthwhile, because:
Normal air also contains about two-thirds of nitrogen.
If you have to correct the air pressure at the petrol station, you only fill up with air anyway.
With the comparatively low pressure and the moderate temperature fluctuations of the car tyres, the slight advantages of the gas hardly matter.
Even tyre gas escapes, the differences between air and gas are only minimal after several months.
In case of a puncture, it makes no difference at all.
We hope you have found this information useful. If you have any questions or want to get your tyre pressure checked/topped up, please come to our Loughborough Refurbsworkshop at any time during our opening hours. We will be happy to help you.