I drive a TRoc R from 2021. Air pressure is checked at least once a month. The shock absorbers are as good as new according to the ADAC test. I now have sawtooth on my first winter tyres and also on these new summer tyres. The formation comes from the rear axle. Air pressure 2.5 to 2.6 bar each. Tires Wimter 215 50 R18 Conti Tires Summer 225 45 R18 Conti Sport Contact 7 The summer tires I will get back have only one outside there I change then times directly on the axle. With the winter tires it is not possible. Does someone have the same product and can report about their air pressure?