Moroso 89562 Pro Series Tire Pressure Gauge Review

I purchased the Moroso 89562 gage in order to insure maximum life and best performance for the very expensive high-performance tires on my new car. I have had too many tires in the past end up with uneven wear from improper inflation through my use of standard-grade economy gages. I was determined that would not happen again. The cost of this gage seemed high at first, but it is only a small fraction of the cost of a new set of high-performance tires. I have three cars and this gage showed that every one of them had incorrect pressures. This is the only gage I have owned where I feel confident that the tire pressure is correct (I have worked with scientific instrumentation throughout my 30+ year career as a physicist).

I chose to go with the mechanical movement in this gage (as opposed to the electronic sensor technology used in some other gages). My faith in a well-built mechanical gage was higher because I felt that it was easier (simpler and less costly) to build an accurate mechanical gage than an electronic gage with the same accuracy. NOTE: Do not confuse ACCURACY with PRECISION. Most manufacturers get this wrong. Accuracy is the ability of the gage to read pressure correctly on an absolute scale. Precision is the ability to see differences between two pressure readings. Most manufactures claim high degrees of accuracy for their gages when they really mean precision. High accuracy is the specification that you need in inflating to the correct pressure.

The readings from this gage are repeatable (the same from one reading to the next) and easy to view on its large scale. The seal between the tire chuck and the valve stem is excellent resulting in virtually no air leakage. You do have to hold the gage upright (as mentioned in the instructions) in order to get an accurate reading.

This is a high-quality instrument that comes in a fitted protective storage case. It should easily pay for itself in longer tire life (replace them less often) and better tire performance (better traction and fuel economy). I highly recommend this gage to anyone - but especially to those who have high-performance and/or expensive tires.

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