Uploaded October 2017 | Updated September 2026, 2 weeks ago
I show straightforward in a nutshell what the numbers mean on a passenger car tire.
You can find tire for your car at Amazon (affiliate link): amzn.to/2zX2TJe
The First number is Tire Width: This is the width of the tire or thickness in millimeters, if measured from a tire’s widest point of its outer sidewall to the widest point of its inner sidewall.
The Second number is Aspect Ratio: This identifies the tire’s aspect ratio, which is the relationship of the tire’s sidewall height to the tire’s width. for example, the sidewall height of the tire is 65% of its width. The lower the ratio, the smaller the sidewall height, which means better cornering, but a rougher ride.
Radial: This is the tire’s internal construction, which is “radial.” Almost every tire on the road has radial construction, which means the cords of the carcass plies inside the tire “radiate” directly across from one side of the tire to the other.
The Third number is Wheel Diameter: This number in inches, indicates that the tire is designed to fit on a wheel with a 18 inch diameter.
I show straightforward in a nutshell what the numbers mean on a passenger car tire.
You can find tire for your car at Amazon (affiliate link): amzn.to/2zX2TJe
The First number is Tire Width: This is the width of the tire or thickness in millimeters, if measured from a tire’s widest point of its outer sidewall to the widest point of its inner sidewall.
The Second number is Aspect Ratio: This identifies the tire’s aspect ratio, which is the relationship of the tire’s sidewall height to the tire’s width. for example, the sidewall height of the tire is 65% of its width. The lower the ratio, the smaller the sidewall height, which means better cornering, but a rougher ride.
Radial: This is the tire’s internal construction, which is “radial.” Almost every tire on the road has radial construction, which means the cords of the carcass plies inside the tire “radiate” directly across from one side of the tire to the other.
The Third number is Wheel Diameter: This number in inches, indicates that the tire is designed to fit on a wheel with a 18 inch diameter.
