Until now, I have never checked the tyre air pressure at regular intervals. However, after an acquaintance had an accident because of a tyre pitcher, and I also read appropriate tips from the ADAC, I would like to do so at regular intervals. However, my project was interrupted by an acquaintance whose tyre dealer strongly advises from testing the air pressure, since there is no calibration at both petrol stations and private equipment, and with every measurement the chance high When measuring at petrol stations, I always had the reservation that the tyres could not be measured cold there. Now to my questions: 1. Is it sensible to check regularly? How regularly should one perform it? 2. Which devices are recommended for the domestic check of the pressure and the subsequent pumping in? I still have a century old compressor, but if it is suitable, I dare to doubt it. My question is to damage the valve. It may sound green, but in the cents of years I drive, I never thought checking was important. Now that my son is more interested in these things after the driver’s license, he always meets me with such things. So would be very grateful if you could give me some information.