TPMS and Inflation

Tire inflation pressure is the number one maintenance issue that fleets face today.

Low tire pressure can have a significant impact and affect on fuel efficiency. Fuel economy can drop almost 5% at 30% under inflation. For instance, if a specified inflation of 100 psi is not adhered to, and is actually 60 psi, it will reduce fuel economy by up to 6% and will destroy the tire as well. 

Approximately 7% of all tires are under-inflated by at least 20 psi. A tire that is 10% under-inflated can equate to a 5% increase in fuel use and can reduce fuel economy by about 1%. And improper tire inflation, if it is as little as 10 psi low, could also equate to 25% less tread-wear life.

It has been shown that automatic tire pressure and/or monitoring can:

  • Increase useful tire life
  • Maximize the casing value
  • Reduce downtime and expense
  • Improve fuel efficiency

There are several tire pressure monitoring systems (“TPMS”). Some only monitor inflation pressure and have a low-pressure warning light, while others can display the actual tire pressure on the dash-mounted monitor, and can alert when pressures are too low or too high. The tire sensors are external and replace the valve-stem caps; and via a radio frequency, they transmit tire pressures to the monitor. Other systems are mounted inside the tires and require professional installation.

Since most drivers do not regularly check their tire pressures, a TPMS is a valuable and economical way to ensure safer driving by maintaining properly inflated tires.


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