And the 15 is the size of the wheel it's designed for. So, in this case you've got a 31-inch tall tire for a 15-inch wheel. You know the wheel radius is 7.5-inches, and the tire radius is 15.5 inches.

You can measure a man’s ring size the same way as any other—however, just note that you’re using the right ring size chart, as men’s rings offer higher numbered sizes.

Selecting the best size of a television in your room also improves the comfort of this experience as well as viewing. This ...

Size doesn’t matter—and this chart proves it. By Karen belz. December 24, 2014. ... she proved that women’s sizes varied significantly based solely on their body type and height.