Is 245-40 a low profile tire?
In a tire size like 245/40R18, the aspect ratio is the second number—in this case, 40. A lower aspect ratio means a shorter sidewall, which is characteristic of low-profile tires. Here’s a breakdown of how it works: Tire Width: The first number in the tire size (like 245/40R18) represents the tire’s width in millimeters. Aspect Ratio: The second number (40, in this example) is the aspect ratio. This percentage indicates the height of the tire’s sidewall relative to its width.