ATV Tires - what does the size mean? What's my rim …
The ATV Code means exactly what it says. Tires made specifically for all terrain vehicles are coded with an AT. Tire Width is the width of the tire, measured in millimeters, when the tire is mounted and inflated to the recommended pressure. The Aspect Ratio is the tire section height divided by the section width (not tread width), multiplied by 100.