Aspect ratio meaning
Aspect ratio definition1. The relationship in a tire or wheel between the distance from the rim to the tread (section height) and the tire's width. Thus, in a P185/80R13 tire, 80 is the aspect ratio, showing the height is 80% of the width. A lower aspect ratio describes a shorter, wider tire.
2. In a wing, it is the relationship of its span (horizontal length) to its chord (height).