Tire Pressure Monitoring System


Though important, only few drivers nowaday has a habit of monitoring their tire inflation pressure. Understandablely, most drivers do not like to bent their waist, lower their head and dirty their hands. They are ignoring the fact that tire inflation drop by 1 to 3 psi naturally every month.

There are many dangers to having under inflated tires, because they are designed for use at their recommended pressure. Under inflation can lead to increased deformation in the tire wall as it concentrates the load upon the tread shoulders, this reduces the amount of surface contact the tire has with the road. This can have many consequences.

  • Increased wear of the tires treads which will lead to a higher chance of aquaplaning in the wet.
  • Reduced handling characteristics and a reduced control of the vehicle.
  • Longer stopping distances.
  • Higher chance of the tire delaminating, which could lead to a sudden tire failure.

According to the analysis by National Highway Traffic Safety Administration (NHTSA) of USA, 85% of the tire damage is caused by natural or slow air leak. If all the cars in US is equiped with tire pressure alarm, they estimate the number of death caused by road accident can be reduce by at least 79 persons, and injury can be reduced by about 10,000 persons.

In the wake of tire safety concerns, the US Congress passed the TREAD Act (Transportation Recall Enhancement, Accountability and Documentation) in November 2000.  The TREAD Act, among other things, required that the US National Highway Traffic Safety Administration (NHTSA) develop some rules and regulations that require all light vehicles sold after 1 September 2007 must have TPMSs fitted as standard equipment.  The TREAD Act also requires that TPMSs must be capable of warning drivers if a tire is significantly under-inflated. Today, all premium car sold in Hong Kong is already fitted with tire pressure monitoring system (TPMS).

In April 2005, the NHTSA released their final rule, requiring manufacturers to install a four-tire TPMS that is capable of detecting when a tire is 'more than 25% under-inflated' and warn the driver. However, the alarm is too late for slow air leak. Also, there is no indication of which tire is under-inflated. Such simple TPMS easily misleads the driver to think they are safe, and they don't check the tire pressure anymore.


We are recommending the 3rd Eye TPMS. Beside the basic alarm function, it has a LCD display that show the figure of tire inflation pressure and tire temperature of all four tires. With full information, driver can easily tell which tire need to re-inflat and when. When the tire pressure drop below a specified pressure, there will be a yellow light flashing. When the tire pressure drop to dangerous zone, audiable alarm will ring immediately. With such convenient monitoring, it is now easy to keep track of the tire pressure. By keeping the correct pressure, it saves fuel, reduces tire wear, and increase tire life.

The 3rd Eye TPMS has a small and pleasant display. It starts up with the vehicle. It automatically displays the information of four tires in turns. The LCD display is backlit for night reading. Technolgy is helpful to monitor the tire inflation, but don't forget to check the tire wear. When tire tread is down to 1.6mm, then the tire should be replaced.


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