There is no right time to change a tire. Nevertheless, the mnemonic "from O to O", i.e. from October to Easter, is still a good orientation guide. Depending on the region, however, this period can be postponed or even extended, because the weather conditions in the lowlands are different from those in the mountains. Even though the winters in Germany have been very mild for years now, driving with winter tyres during the cold months is recommended. This is because the rubber compound of the tires ensures a secure grip on the road even in cool temperatures. Wheel changes and regular tyre checks are immensely important for your safety. According to the law, the wheels must be adapted to the weather conditions, otherwise you could face heavy fines.

Differences between summer and winter tyres and all-season tyres

The difference between summer, winter or all-season tyres starts with the different tread structures. Summer tyres have coarse tread cuts and do not have sipes like winter or all-season tyres. Winter tyres have an altogether finer tread and have the so-called sipes on the entire tread surface. The sipes form additional gripping edges that interlock with the ground and provide grip even at low temperatures. The all-season tyre is a mixture of both tyre types in terms of tread structure. The all-season tyres are also often called all-weather tyres and have a coarser tread pattern than the winter tyre. The sipes are only distributed in the middle part of the tread. The efficiency on icy and snowy roads is therefore reduced.

Your tyres should always have sufficient tread. Even though 1.6 millimetres of tread are permitted by law, the ADAC recommends a much greater tread depth. Three millimetres for summer tyres and four millimetres for winter tyres. The tread depth is important for optimum braking distance and vehicle control. In addition, the risk of aquaplaning can be significantly reduced with an appropriate tread depth. You can check the exact tread depth using a tread depth gauge. Even a one-euro coin will give you information, as the golden edge is 3 millimetres wide. When you insert the coin into the tyre tread, the edge should disappear in the tyre. It is best to repeat this test at several places in the car tire. In addition, the newer tyres have a tyre wear indicator. These are small bars that are arranged in the grooves of the tread. They are generally arranged at right angles to the running direction. The letters TWI are often found next to them. If the bars are worn down to the point where they are level with the tread, the tyre should be replaced.

In addition, the age of the tyres is also decisive and should not be underestimated, as the rubber hardens over time due to external influences such as UV radiation. Even if one assumes a service life of eight to ten years, a tyre should be checked for damage from the age of 6 years on. Because, depending on the kilometres, driving style and the surface, car tyres can show cracks and damage even earlier. The age of the car tyres can be determined using the DOT number. The first two digits stand for the calendar week, the last two digits for the year of manufacture. A tyre with DOT 3217 was therefore manufactured in the 32nd calendar week of 2017.

In addition, the ECE marking is located next to it. Tyres with the E1 marking are approved for Germany. Furthermore, winter tyres also carry the M+S symbol, which stands for slush and snow. However, car tyres manufactured after 1 January 2018 must carry the new Alpine symbol. This is a snowflake symbol surrounded by a mountain. From 30 September 2024, all winter tyres must have the Alpine symbol.

1. Strongly secure the vehicle
   First of all, the vehicle should be parked on a level place and secured against rolling away. To do this, apply the handbrake or, in the case of automatic transmission, move the lever to position "P". It is best to change the wheels with gloves to protect yourself from dirt and minor injuries.
2. Loosen the wheel nuts
   Remove the hubcaps. Now slightly loosen the wheel bolts of the vehicle by a quarter turn each time.
3. Jack up the car.
   Make sure that the jack is correctly positioned on the vehicle. Now the vehicle can be lifted.
4. Unscrew the wheel
   Now loosen the screws crosswise and remove the car tire.
5. clean
   Not to be forgotten is the cleaning of the wheel contact surface and the wheel bolts with a steel brush. The wheel sits more securely and is also easier to remove. On this occasion you should also take a look at the brakes. The brake discs should be smooth and without grooves. The pads of the brake pads should not be below the wear limit.
6. put on the wheel
   Before putting the tyre on, some screwdrivers swear by greasing the wheel hub. However, make sure that no grease gets on the brake discs and the wheel nuts. Now the wheel nuts can be hand-tightened.
7. tighten
   After the above steps have been carried out on all wheels, the vehicle can be set down carefully. Now the wheel nuts have to be tightened crosswise with the correct torque.
8. mark
   The dismantled tyres can then be marked. They should also be checked for damage and sufficient tread before storage.

If you don't feel confident about changing the wheels, don't want to get your hands dirty or just want to play it safe, have the tyres changed in a specialist workshop. The following aspects speak in favour of commissioning the workshop:

• The specialist workshop can better detect damage to the car tyres
• it is checked whether a tyre needs to be balanced (describes the removal of an unbalance to minimise wear, noise and vibration)
• the workshop has the right tool - also for balancing the tyres
• the car tyres can be stored for a fee

We have the right tools and accessories for changing tyres as well as the tyre pressure sensors at a reasonable price. If you are unsure which articles you need, you are welcome to contact our customer service with the 17-digit chassis number. We look forward to hearing from you!