Racing Tire Hardness Tester Tire hardness has a huge affect on your car's performance. A tire too hard won't bite and a tire too soft may wear quickly or even ball up. Also tire hardness changes during its life cycle. To run your best you must keep track of all your tire's hardnesses. This easy-to-use tool will help you do just that - quickly, accurately & easily. NEW Digital Readout 0-100 (Shore 'A' scale) Straight edge on base to 'rock' durometer for more consistant results Non-slip coating for better grip Accurate easy-to-use Includes Silver case For the most consistent results rock the durometer from angled back past straight up to angled forward. The readout will move up to the highest (true) reading, then back down. Record the highest reading reached. The durometer must have a straight edge on base to do this properly. If you just push straight down you may get inconsistent and inaccurate results. Pit Stop USA offers Longacre Racing Products 50547, Longacre Digital Durometer with Silver Case at low everyday prices. Be sure to check out all of our products from Longacre Racing Products including Longacre Racing Products Durometers & Depth Gauges and more.