While new vehicles are equipped with TPMS, these systems issue a low pressure warning only after tire pressure drops 25 percent below the vehicle manufacturer’s recommended pressure. Pressure differences are measured "indirectly" via for example tire rolling circumference changes.Ĭar manufacturers may opt either for direct or for indirect systems. Indirect systems - no pressure sensor fitted to the tire/rim. There are essentially two main types of TPMS system:ĭirect systems - pressure sensors integrated with the valve or attached to the rim or inside of the tire. The TPMS can be based on different concepts and sensors. Hidden tire damages are not rectified by adjusting the tire pressure.Ī Tire Pressure Monitoring System (TPMS) must be installed in all new cars. This can result in tire failure or even a blowout. SAFETY WARNING – Under inflation can lead to the inside of the tire being damaged. Economy (higher fuel consumption, lower mileage).Driving safety (tires can dislodge from the rim when cornering).Vehicle handling behavior, especially when cornering at speedĭriving on underinflated tires has a negative impact on:.If the reading is below the recommendation, fill your tire with air until you’ve reached the recommended pressure.ĭo this for all the tires on your vehicle…including the spare!ĭriving on overinflated tires will have a negative impact on: If the reading is above the recommendation, push in the valve to let out some air. Place the tire pressure gauge into the valve stem and press down quickly to get a reading.Ĭheck the psi reading and compare to the recommended psi. Remove the end caps on the valve stems of your tires (don’t lose them!). Once you’ve identified the manufacturers recommended pressure, you’re five minutes from completion. There are battery-operated digital gauges and the more traditional stick-type gauge, either one will work and shouldn’t set you back more than $15. You will need an accurate tire pressure gauge which you can find at your local auto parts dealer. As mentioned above, just be sure to check pressures when tires are cold, or haven’t been driven in several hours. You can check your tire pressure right at home. And don’t forget to check your spare tire! This fluctuation throughout the year leads to the recommendation of checking your tire pressures at the beginning of each month and before long road trips, where the additional load may require the tire pressures to be increased according to the specification. In the winter, your tires could experience a drop of nearly 5 psi which affects traction, handling and durability. So you should never reduce the pressure inside warm tires because when they have cooled down, the pressure could fall to below the minimum tire pressure.Īs temperatures drop in the fall and winter, it’s especially important to check tire pressures. The pressure inside warm tires will be higher due to the fact that driving causes heat buildup. Conversely, if the ambient temperature drops 10 degrees, the tire pressure will decrease by 1 psi. So if the outside temperature increases by 10 degrees, the tire pressure will increase by 1 psi. Tire pressures can fluctuate 1 psi for every 10 degrees Fahrenheit. Hence, cold inflation pressure.ĭaily temperatures rise and fall between day and night and as we move through the seasons. This means that you should check your pressures in the morning before the tire has been run, before the ambient temperature rises, and before exposure to direct sunlight. Gas expands when heated and contracts when temperatures decline. Recommended tire pressures for your vehicle are based on cold inflation pressure. These pressures are set to help keep you safe and comfortable on the road so it’s important to follow them.īut how do you know what the recommended tire pressures are? The recommended tire pressures for your vehicle//tire combination can be found in your vehicle handbook, inside the fuel filler flap or on the driver's door post. The psi is based on your vehicle’s total weight and size, towing weight capability, and recommended tire size. ![]() The tire pressures specified for your vehicle are agreed to between the vehicle manufacturer and the tire producer.
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