Product Warranty
UNDERINFLATION
It is impossible to determine whether tires are properly inated by simply
looking at them. It is almost impossible to “feel or hear” when a tire is
being run underinated or nearly at. Tires must be checked monthly with
a tire pressure gauge.
Pressures should be checked when tires are cold, in other words, before
they have been driven on. Driving, even for a short distance, causes tires to
heat up and air pressure to increase.
Checking pressure when tires are hot:
If pressures are checked after tires have been driven for more than three
minutes or more than one mile, (1.6 km) the tires become hot and the
pressures will increase by approximately 4 psi. Therefore when the tire
pressure is adjusted under these conditions, it should be increased to a gauge
reading of 4 psi greater than the recommended cold ination pressure.
For Example Only:
Gauge reading of hot tire: . . . . . . . . . . . . . . . . . . 32 psi (220 kPa)
If recommended cold ination pressure is: . . . . . 30 psi (205 kPa)
Desired gauge reading of hot tire 30 + 4 psi = . . . 34 psi (205 + 30 = 235 kPa)
Therefore: add 2 psi . . . . . . . . . . . . . . . . . . . . . . . . (15 kPa)
Check cold pressure as soon as possible, preferably within 24
hours. “Bleeding” air from hot tires could result in underination.
Use an accurate tire gauge to check pressures. Never allow children
to inate or deate tires.
TIRE PRESSURE MONITORING SYSTEMS (TPMS):
Your vehicle may be equipped with a Tire Pressure Monitoring System
(TPMS) that is designed to monitor the pressure of tires mounted on your
vehicle and sends a signal to the driver if a tire pressure falls below a
predetermined level. A TPMS should not replace monthly manual pressure
checks for all four (4) tires and the spare. We recommend that you
manually monitor and check tire pressure ination with a pressure gauge.
Your tires should have the recommended pressure listed by your vehicle’s
manufacturer. This information can be found in the vehicle owner’s manual
and often on a placard located in the vehicle’s door jamb, inside the fuel
hatch, or on the glove compartment door. If you have a plus size tment
that requires a higher ination pressure, your tire pressure monitoring
system will require re-calibration to the new ination pressure. Refer to
your tire dealer/installer of plus size tires for proper ination pressure.
We recommend checking air pressure once each month, and before a
long trip. Whether you have a full-sized or mini-spare, make sure that it
is properly inated as well. If the TPMS generates improper monitoring
or signals we recommend that you consult your owner’s manual provided
with your vehicle and follow-up with your vehicle’s manufacturer.
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