How to Determine the Width of a Car Tire?
2 Answers
Method to determine tire width: Taking the tire specification 195/65R15 as an example, 195 indicates that the tire width is 195mm, 65 represents that the tire's section height to width ratio is 65%, R stands for radial tire, and 15 denotes that the wheel rim diameter is 15 inches. Below is an introduction about tires: 1. Precautions: Tires are circular elastic rubber products assembled on vehicles or machinery for ground rolling, mounted on metal rims to support the vehicle body, cushion external impacts, and ensure driving performance. 2. Performance: Tires are used under complex and demanding conditions, enduring deformation, load, force, and high and low temperature effects, possessing high load-bearing capacity, traction performance, and cushioning performance.
When I first started driving, I didn't know how to check tire width either, but later I figured out a trick: just look at the side of the tire where there's a row of codes printed, like 225/55R17. The first three digits, 225, represent the width in millimeters, which is the maximum distance across the tire's cross-section. If the code isn't clear, you can simply measure the middle of the tire's top with a tape measure—just don't do it when the tire is flat, or the measurement won't be accurate. Width really affects driving feel—too narrow, and you'll have poor grip, making it easy to skid in the rain; too wide, and fuel consumption increases quickly, and you might even risk scraping the car body. I recommend keeping note of the original factory size so you can match it when replacing tires to avoid issues. Regularly checking tire wear can also extend their lifespan—safety first, after all.
