What does 22x12x9 mean on my ATV tire?

Inch size is the most widely used measurement in ATV tires, lawn tires, some older motorcycle tires and automotive tires. For the ATV tire size 22x12x9:

22 = The overall height of the tire when mounted and inflated to recommended air pressure. In this example, the tire is 22 inches tall.

12 = The overall width of the tire when mounted and inflated to recommended air pressure. In this example, the tire is 8 inches wide.

9 = The diameter of the wheel that this tire will mount to. In this case it will be a 9 inch diameter wheel.