How to Calculate Tire Diameter?

1 Answers
AdrianRose
07/30/25 7:00am
Tire diameter calculation method: The diameter of the tire is equal to 2 multiplied by L (tire width) multiplied by V (aspect ratio) divided by 100 plus d (rim diameter) multiplied by 25.4. For example, 205/65R16 indicates: L equals 205mm, V equals 65, d equals 16 inches, and its tire diameter is: 2 multiplied by 205 multiplied by 65 divided by 100 plus 16 multiplied by 25.4 equals 672.9mm. Car tires ensure good ride comfort and smooth driving, guarantee excellent adhesion between the wheels and the road surface, improve the vehicle's traction, braking, and off-road capability, and bear the weight of the car.
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