Easily figure out your tire stagger, the difference in circumference from one tire to the other with the help of this unique tire tape measure. The tape works by first measuring the largest tire and then using this dimension when measuring the smaller tire. The tape does the math for you, the value the larger tire size aligns with is your stagger value or amount of stagger.
 
Instructions for Use: 
Measure the circumference of the larger tire and note the size to be used in step #2.
Wrap the tape around the smaller of the two tires and the measurement or value that aligns with the size from step #1 is the difference in the tire sizes or the stagger amount.