1/1/2024 0 Comments Semi tire psiThe rule of thumb (best understood as our American counterparts put it) is that tire pressure will go up approximately one pound per square inch (PSI) for every 10 Fahrenheit increase in temperature. So, let’s say your manufacturer’s recommend inflation level is 35 PSI, on one of those all-time hot August afternoons, your tire pressure could be somewhere near 40 PSI. Just as cold outside air causes the air inside your tires to contract in winter, warm outside air causes the air inside your tires to expand in summer. Before you know it, your tires are underinflated. Be sure to check your tire pressure regularly during the winter months. When the temperature drops, air contracts and as the molecules get closer together, the reduction in volume causes tires to lose their pressure. How do summer and winter temperatures impact tire pressure? When your tires are consistently inflated to the recommended air pressure, you enjoy greater tire life, performance and safety. If you’re not confident about how to check your tire pressure, follow our handy 5-step Guide to Checking Tire Pressure. If you’ve been driving with your tires over-inflated or under-inflated, immediately deflate them to the manufacturer’s recommended pressure for your driving safety. The result is poor gas mileage and higher fuel costs – up to 1.3 cents per litre! Depending on how often you fill up, that can lead to hundreds of dollars over the space of a single year. Vehicles with underinflated tires see reduced fuel economy because they make your engine work harder: underinflated tires put more tire surface in contact with the road, causing more rolling resistance and friction with the road. Under inflation wears your tires on both outside shoulders because the edges are making excessive contact with the road.
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