Cat’s Eye makes it easy to see if your tires are underinflated. This system attaches to the dual’s hub or lug bolt and allows air transfer from one tire to the other. Its single airing point fills both tires at once, making the job quick, clean and easy. With just a glance, you’ll instantly see changes in tire pressure. When the “eye” is completely closed, the tires are within 2% of recommended pressure and are equalized   As the “eye” begins to open, the pressure has dropped 5-6%, a sign of a slow leak.  When the “eye” is completely open, the pressure has dropped 10% under the recommended pressure and needs immediate attention. At this point, the internal check valve is activated, isolating the good tire from additional pressure loss.

Installing the gauge is a quick and easy process. The new seal will stand up to sharp valve stem edges and repeated installations. Cat’s Eye comes with wheel and hub mounting brackets Position valve stems 180° across from each other

Make sure they are clean and in good operating condition.  Attach the Cat’s Eye gauge to the wheel or hub with the appropriate mounting bracket Finger tighten hose ends, inside tire first, until you hear the seals take hold.

Give each fitting an extra 1/2 turn to ensure a tight seal. Then bubble test. (See the complete installation instructions when installing Cat’s Eye.)

If the pressure in your duals is not the same, the diameter of the tires will not be equal. Since duals are bolted together, the smaller tire is going to be dragged by the larger tire.

If the pressure difference is greater, so is the damage. The easiest way to insure that both tires are equal size, is to equalize the pressure

Tire manufacturers estimate a loss of

$177 per year due to treadwear and fuel costs

for each tire running 30% underinflated.