From summer to winter: When are tyres replaced?
The laws on winter tyre use in Europe are decided locally. Whilst there are countries with statutory requirements, there are also countries such as Germany which merely have a situational obligation to use winter tyres. This is where the problem lies: Anyone who causes an accident through the use of summer tyres during winter in these countries has to pay a substantial fine. Winter tyres are also at their most effective when the temperature is below seven degrees Celsius.
Drivers should take care to bear in mind when winter tyres are sensible and replace tyres accordingly – depending on the weather and also the region. The German “O to O” rule is a good reference point. Vehicles should be switched over to winter tyres in October, then at Easter – "Ostern" in German – switched back to summer tyres.
If you use the previous year’s tyres, then check that the wear limit on the winter tyres has not been exceeded. The same applies to the wear limit on summer tyres. The tyres only provide the desired degree of safety an the lowest possible fuel consumption under those conditions.
Replacing tyres: Other things to bear in mind
Many drivers leave it to the professionals when it comes to replacing tyres. If you decide to change tyres at home, it's worth taking a few things into account: It is advisable to obtain a hydraulic vehicle jack. The spare jack in the boot should only be used in emergencies. With the latter, there is a greater risk that the vehicle could fall off and be damaged as a result – or, worse still, injure the mechanic.
When replacing tyres, you should always change both tyres on one axle before moving on to the other. Those who don’t have so much experience may also ask: do the new tyres or the tyres in better condition go on the front or rear? Always mount the tyres with the better tread on the rear axle. The reason: The rear axle ensures tracking stability, regardless of whether the vehicle drive is at the front or back.
Check the wheel bolts every time the tyres are replaced, as wear also takes place there. After approximately 50 kilometres, tighten the bolts once again. This is particularly important if driving with aluminium rims. As this material is extremely lightweight, it yields to the pressure from the bolts over time. Make sure you check the tyre pressure after every tyre exchange.