How cold weather affects tire pressure and what to do

© A. Krivonosov

In winter, tires can seem to deflate even without a puncture, and the reason is straightforward: cold air contracts, so pressure falls. A simple yardstick — every 10°C drop often translates to about 0.1 bar less. That’s why a wheel set to 2.2 bar at 20°C can show around 2.0 at freezing point, and drift toward 1.8 bar when it’s −20°C. Over a season, the swing between a warm garage and deep cold often reaches 0.3–0.4 bar, while manufacturer specs are typically stated for roughly 20°C.

According to the 32CARS.RU website, which cited expert Dmitry Novikov, winter calls for more frequent pressure checks than summer. A practical rhythm is a check every two weeks, with once a month as the bare minimum. Measure on cold tires, after the car has been parked for several hours; otherwise the gauge will read higher. Inflate strictly to the values shown on the doorjamb sticker or in the owner’s manual.

In severe frost, some drivers keep a small buffer by adding 0.1–0.2 bar to offset the drop once they head into the cold. It’s not worth straying far from the recommended numbers, though: overinflation chips away at grip and comfort, while noticeable under-inflation raises the risk of sidewall damage, stretches braking distances, and makes the car feel skittish.