Next up is tire width from sidewall to sidewall measured in millimeters followed by the aspect ratio after the slash. This measures the ratio of the height of the tire's cross-section to its width.
Inch size is the most widely used measurement in ATV lawn tires, some older motorcycle tires and automotive tires. The example below is an ATV tires size 25x8-12 or 25x8.00-12. Also, if this size said 25x8R12 the “R” would indicate that the tire is of radial construction.