Best-in-class 21 inch tires at the best price

Compare a variety of top-notch 21 inch tires from Firestone Complete Auto Care. From superior all-season tires to high-performance summer tires, reliable winter tires, and even ones that could help maintain your vehicle's fuel efficiency, you'll find 21 inch tires that fit your car, truck, or minivan, as well as your budget at your nearby Firestone Complete Auto Care location. All 21 inch tires are organized by tire width, height, and diameter. Select the size that fits your vehicle and get an instant online quote!

What's My 21 Inch Tire Width & Height?

To find your vehicle's tire width (or cross section), check the vehicle's tire information placard on the inside of the driver's side door. You can also find its width by checking the sidewalls of your current tires. There, you'll see a series of numbers and symbols similar to: P215/60 R17. The width of your tires will be the first number in the series and it is measured in millimeters (mm). In this example, the tire's width would be 215.

How to Find the Height of 21 Inch Tires

To find your vehicle's tire height (or aspect ratio), check the placard on the inside of your driver's side door or check the sidewalls of your current set of tires. There, you'll see a series of numbers and symbols similar to: P215/60 R17. The number directly after the / refers to the height of your tires. In this example, the height of the tires would be 60.