Review on Accurate and Convenient Tire Tread Depth Gauge Tool by Preciva, LCD Display, Inch and MM Conversion (0-0.98 Inches) by Robert Dickinson

I have used this to measure the tires on my cars. I didn't want to be surprised that I needed tires for the inspection, and I also wanted to be able to measure a set of used tires to avoid the added expense of buying new tires. It doesn't show fractional measurements for imperial units, but you can easily do math to convert decimals. Instead, you can create or print out a cheat sheet. The screen is easy to read during the day. It is very easy to zero the measurement if the instrument is inaccurate. Cons - I don't like that the tool turns on every time the probe is moved. This may not be ideal if the tool is in your pocket. Cheat sheet: 2/32 = 0.063 inch (most states require this minimum) 4/32 = 0.125 inch (most manufacturers recommend replacement) 6/32 = 0.1888 / 32 = 0.25010 / 32 = 0.313 it is new)