What does the tire size 255/45R20 mean?

1 Answers
DiSawyer
07/29/25 1:18pm
Tire size 255/45R20 indicates: 255 represents the tire's section width of 255 millimeters; 45 denotes the aspect ratio, meaning the tire's sidewall height is 45% of the section width; R stands for radial tire; 20 indicates the rim diameter of 20 inches. Relevant information about tires is as follows: 1. Automobile tires are one of the crucial components of a vehicle, directly contacting the road surface and working with the suspension system to absorb shocks during driving, ensuring good ride comfort and smoothness; maintaining excellent adhesion between the wheels and the road; enhancing traction, braking, and off-road capability; and bearing the vehicle's weight. 2. Passenger car wheels generally use radial tires. The specifications of radial tires include width, aspect ratio, inner diameter, and speed limit symbols.
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