How to Identify Vehicle Tire Models?
2 Answers
Vehicle tire models can generally be found on the sidewall of the tire. For example, 225/50R1798H, where 225 represents the tread width in millimeters; 50 is the aspect ratio, indicating 50%, with most household car tires having an aspect ratio between 30% and 80%. Under normal conditions, the aspect ratio of ordinary car tires is generally greater than 75%; R indicates the tire has a radial structure, 17 is the rim diameter in inches; 98 refers to the load index, with each tire supporting 750kg. H represents the speed rating, with a maximum speed of 210km/h. In addition to the model, tires also display the following common data: Tire cord material: Indicated by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord tire. Speed rating: Indicates the maximum speed at which the tire can carry a specified load under specified conditions. Letters A to Z represent certified speed ratings from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h; Rim specification: Indicates the rim size compatible with the tire for practical use, such as 'Standard Rim 5.00F'.
As a seasoned driver with decades of experience, I know identifying tire models is quite simple. Just crouch down and look at the sidewall of the tire, where you'll find a series of numbers and letters, like 205/55 R16 91V—this is as important as an ID card. The 205 refers to the tire width in millimeters, 55 is the aspect ratio, meaning the height is 55% of the width, R stands for radial construction, and 16 is the rim diameter in inches. Don’t overlook the 91 and V either: 91 is the load index, telling you how much weight the tire can bear, and V is the speed rating, indicating a maximum speed of 240 km/h. Many people only focus on the size when replacing tires and forget to check compatibility, which can lead to vehicle instability or increased fuel consumption. I also recommend checking the production date during routine maintenance—for example, 2223 means the tire was produced in the 22nd week of 2023—to avoid buying old stock tires. Choosing the right tire is crucial for driving safety, especially in rain or snow, as seasonal tire markings differ: summer tires are usually marked S or M+S, while winter tires have a snowflake symbol. Regularly checking these details makes replacing or buying used tires much easier.
