![]() However, you'll also gain in efficiency – the higher the pressure, the lower the rolling resistance. However, if the manufacturer recommends lower than 40 psi, you risk worse ride comfort, increased wear on the center of the tread, and less grip. Most EVs today come with recommended pressures of around 40 psi for longer range, but also increased low capacity, as they are heavier than regular vehicles. If the manufacturer recommends 40 psi on your car, it would be the perfect middle ground between performance, comfort, tread wear, and fuel economy. For example, the minimum tire pressure on the Tesla Model S is 40 psi since it's a heavy electric vehicle with staggering performance, but regular gas cars usually need lower pressures. Remember, though, all of these things are only true if the manufacturer recommends 40 psi tire pressure on its vehicle. Hence, it's crucial to always keep your tires properly inflated. Namely, due to the lower pressure, the tire won't be able to cut through puddles of water as easily and will float over, which can dramatically destabilize your vehicle, even when driving in a straight line. There is also one very important factor to consider – tires with lower than 40 psi more easily. You'll feel these things almost immediately after you lower the pressure inside your tires. On top of that, it increases the chance of damage from impacts, like potholes or curbs, as there won't be enough air to support the other internal components of the tire.īut the biggest changes will be worse performance and fuel economy due to higher rolling resistance and less agile handling. Nonetheless, tires with less than 40 psi, or lower than the manufacturer's recommended pressure, will wear down faster. Moreover, you can expect higher traction on snow and ice and on some off-road terrains, like deep mud or large rocks. Still, lower pressures than 40 psi will generally give you a softer ride, which you can especially feel if the roads in your area are of a low quality. Thus, it's completely normal to drive with tires at, say, 32 psi or 36 psi, as the manufacturer tested the vehicle excessively and found that these values work best with the particular model. Most passenger vehicles today come with recommended tire pressures of under 40 psi for an unloaded vehicle (one to two passengers). But let's have a look at other reasons why you would want to do that: 1. Generally, you should always inflate your tires to 40 psi (or higher) when you load your vehicle, like, for example, before going on a summer vacation. Still, you could play with the tire pressure a little in order to find the perfect blend of performance, comfort, and fuel economy. So, it really depends on the model, which is why you should always inflate your tires upon the manufacturer's recommendations. However, 40 psi is actually low for heavy-duty trucks like the Ford F-350 and Chevy Silverado 3500, which need load range E tires inflated to 80 psi to carry all that heavy cargo. Other Tire PressuresĤ0 psi (2.8 bar) sits at the highest end of what you'd consider normal tire pressure in hatchbacks, sedans, crossovers, small and mid-size SUVs, and sports cars. Can You Manipulate Tire Pressure for Track Driving or Off-Roading?. ![]() Changing Tire Pressure When Carrying Heavy Cargo.What's the Recommended Tire Pressure for my Car?.But let's dig deep into the tire pressure rabbit hole since there is much more to discuss here. Besides, I immediately saw the fuel economy go down, and I'm sure the tires wore faster for those couple of days.īut should you go higher? Is 40 psi good tire pressure? It depends on the car, of course, since some manufacturers recommend such pressures. Actually, I tried underinflating them to 2.2 bar (32 psi), and the ride didn't improve much, yet the car was much less agile in the corners. I never had issues with the ride being choppy at the recommended pressure. The higher pressure also significantly reduces fuel consumption and emissions, which is not insignificant. ![]() In other words, the manufacturer (in this case, Toyota) designed the suspension to work optimally at a tire pressure of 2.5 bar (36 psi) and give me a smooth ride while also remaining stable at high cornering speeds. But Toyota knows even better than the technician or me, and the same is true for every other vehicle manufacturer.Īutomakers test their vehicles to the limit for thousands of miles and at various loads to find the perfect tire pressure. Now, I know a thing or two about tires and told him to inflate them to the manufacturer's recommended pressure.
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