The ratio of section width to section height is known as the aspect ratio-

The statement "The ratio of section width to section height is known as the aspect ratio" is True. In the context of automotive wheels and tires, the aspect ratio is indeed the ratio of the tire's section width to its section height.

The section width of a tire refers to the width of the tire's cross-section (from sidewall to sidewall) in millimeters.
The section height of a tire is the height of the tire's cross-section (from the rim to the outer tread) in millimeters.

The aspect ratio is calculated as:

$$\text{Aspect Ratio} = \frac{\text{Section Width}}{\text{Section Height}}$$

It's an important parameter that affects the tire's performance and characteristics, such as sidewall height and ride comfort.

So, the statement is True.