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How to Calculate the Outer Diameter of a Tire?

1 Answers

Stuart

07/29/25 12:39pm

The calculation formula for the outer diameter D of a tire is: D = rim diameter + tire width × aspect ratio × 2. A tire is a circular ring, so it has inner and outer diameters, with the outer diameter referring to the diameter of the circle in contact with the ground. The size data of the tire are marked on the sidewall of the tire, which includes recommended tire pressure, size, production date, speed rating, load index, and other information. Relevant information about car tires is as follows: 1. A tire is a circular elastic rubber product mounted on various vehicles or machinery that rolls on the ground. 2. Car tires are one of the important components of a vehicle. They directly contact the road surface and, together with the car suspension, help to absorb shocks during driving, ensuring good ride comfort and smoothness. They also ensure good 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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