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Frequently Asked Questions
The numbers within the size indicate the tire’s width, component ratio, and wheel diameter. Here’s how each thing works:
- 245: This is the width of the tire in millimeters. A 245-mm tire is considerable.
- 45: This is the aspect ratio of the tire; that's the height of the tire’s go-phase to its width. This means the tire’s height is 45% of its width.
- R: This stands for radial, which means the layers run radially across the tire.
- 18: This indicates the size of the wheel rim in inches. So, this tire would fit an 18-inch rim.
The tire size 245/45R18 is commonly used on luxury touring vehicles. For example, it’s the original equipment tire size for certain models of the BMW 5 and 7 Series, Mercedes-Benz S-Class, and Audi A6.
To accommodate these tires, you’ll need a rim size of 18 inches with a width range of 7.5 to 9 inches. The combination of a well-fitted rim and these tires ensures optimal performance, handling, and safety.
