As you get behind the wheel this winter bear in mind that cold weather can affect the pressure in your tyres, and this makes driving in difficult conditions more hazardous. Your tyres feel the cold as much as you do, and when the temperature drops so does the pressure in your tyres. Similarly, if you drive somewhere with high altitude, your tyre pressure will drop faster. As a rule, with every 100C the temperature drops, your tyres lose between one and two pounds per square inch (PSI) or 0.07 to 0.14 bars. You should therefore check them more often during the winter months and it is recommended that you do this fortnightly. You’ll need to do this after your car has been parked for at least three hours as this will give you the correct cold tyre pressure, so don’t check them just after you’ve been driving. By making sure they are properly inflated, your car will have better traction on icy or wet roads. Even if you have a tyre pressure monitoring system in your car, you should still check your tyres. If you’re not sure what your car’s tyre pressure should be, you can find it on the door frame on the driver’s side, your vehicle handbook or on the fuel cap. Keeping your tyres at the correct pressure also helps with your fuel economy ensuring you get the full mileage from each litre of fuel.