And if the pressure in any tire drops about 10 percent below its recommended level, an idiot light on the dashboard comes on. And heat can cause the tire’s belts to separate and come apart.Įvery car now has a Tire Pressure Monitoring System or TPMS, which is a built-in gauge and a way to communicate with the car’s computer. Underinflated tires put a larger rubber contact patch on the road, create more friction and therefore run hotter. Of the two ways to miss your mark, underinflating your tires is the bigger danger. ![]() With tire inflation, you can muck around and get close enough, and still live a full and happy life. Do I need to do that? What’s the acceptable range for over and under inflation of tires? - Jay In the process of adding air, I’ll sometimes go over by half a psi or one psi, which I then bleed off. I crank up the compressor and after a few tries, I finally get exactly that one psi in there. Unbalanced wheels (sometimes noticeable as vibration through the steering wheel) affect vehicle handling and tire life. It helps maintain an even treadwear pattern which enhances the tire's overall wear quality, decreases road noise and maximizes tire life. I check the pressure monthly, and there may be a loss of one to two psi on a couple of tires. Tire rotation is an essential part of tire maintenance. ![]() If a driver reduces tire inflation pressure, they are solely responsible to ensure that the load capacity of the tires is not exceeded and the vehicle is capable of operating safely.The owner’s manual for our 2015 Toyota Camry recommends a tire pressure of 35 psi for all the wheels. Yokohama always recommends for drivers to follow the placard pressures. Reducing inflation pressure from that specified by the manufacturer reduces load capacity and changes handling characteristics which can be dangerous. Inflation Pressure for LT Tires on Heavy-Duty Vehicles: Vehicle manufactures utilize load range D and E LT tires to achieve the high load capacities of which heavy duty vehicles are capable. If a lower inflation pressure is used to gain additional flotation/traction at low speeds, the tires must be re-inflated before resuming driving on the highway or at higher speeds, whether on-or off-road. Reducing inflation pressure to increase off-road traction can result in over deflection, excessive heat buildup and ultimately tire failure. Off-road driving, especially at low inflation pressure, increases the risk of damaging the structure of the tires due to impacts. Inflation Pressure for Off-Road Use: Inflation pressures for tires used in most off-road situations should be the same as those for highway driving. If your vehicle is equipped with a tire pressure monitoring system (TPMS), it does not replace your manual monthly inflation checks. Do not overlook spare tire inflation pressure. Frequently checking your psi becomes even more important in the fall and winter, when outside temperatures drop and weather conditions fluctuate, causing your tires to lose pressure more quickly. Do not reduce pressure when a tire is hot and do not inflate a cold tire higher than limits molded on the tire’s sidewall. Use an accurate tire gauge to check pressure since it is not possible to tell an underinflated tire just by looking at it. Tire pressures must be checked at least once a month and before long trips, when tires are cold (before operation, cool to the touch). ![]() ![]() Always keep tires inflated at the pressure specified by the vehicle manufacturer. Proper inflation is necessary for tire safety, performance, maximum tread life and best fuel economy.
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