Risk of an accident due to incorrect tire pressure: ACE calls for better support.

A recent survey by the German Road Safety Council (DVR) shows clear deficiencies in tire pressure monitoring. According to the survey, 44 percent of respondents check their tire pressure less frequently than every three months, 16 percent completely forgo it. The ACE Auto Club Europa emphasizes, in light of these results, the safety-relevant importance of a correctly set tire pressure.

Accident risk due to incorrect tire pressure

According to the Federal Statistical Office, there are around 1,000 traffic accidents annually caused by defects in the tires. A wrong tire pressure is among the possible causes. Even a drop of 0.5 bar can impair handling — for example through imprecise cornering, understeer, and extended braking distances. Additionally, rolling resistance increases, leading to greater wear and higher energy or fuel consumption. Conversely, too high a pressure causes uneven wear and reduces ride comfort.

Regular checks recommended

The ACE recommends checking the tire pressure in passenger cars every two to four weeks, and in motorcycles before every ride. For longer journeys and when heavily loaded, the pressure should always be checked and adjusted. Depending on the load condition, differences of up to one bar may be required.

Effects on headlight aim

An unadjusted tire pressure can also change the vehicle’s stance and thus affect the alignment of the headlights. If the rear of the vehicle sinks due to a high payload, the headlights shine higher and can dazzle oncoming road users.

Guidance and measurement conditions

Information on the recommended tire pressure is usually found in the fuel filler flap, in the door frame, or in the owner's manual. Manufacturers also provide tables for different loading scenarios. Tire Pressure Monitoring Systems (TPMS) can help, but they do not replace regular manual checks.