The TIRESIZER® is the only tape measure designed exclusively for all forms of racing with a custom pre-bent tip and a built-in stagger gauge with fractions to INSTANTLY MEASURE STAGGER. The zero starts 3" from the tip allowing the tape to lay flat on the tire. The design of the TIRESIZER® when rolled around a tire allows the lines to line-up for the most accurate measurement possible. Whether you race on dirt or asphalt, ovals or road courses the TIRESIZER® is the fastest, easiest and most accurate way to measure your tires. The TIRESIZER® does the math for you. A RACERS MUST HAVE TOOL.