How to Identify Vehicle Tire Model Numbers?

1 Answers
ValeriaMarie
07/28/25 6:45pm
Vehicle tire model numbers can generally be identified on the tire sidewall. For example, 225/50R1798H: 225 represents the tread width in millimeters; 50 is the aspect ratio (50% here), with most passenger car tires ranging between 30%-80%. Normally, standard car tires have aspect ratios above 75%; R indicates radial construction; 17 denotes the rim diameter in inches; 98 refers to the load index (750kg per tire); H represents the speed rating (maximum speed 210km/h). Besides model numbers, tires also display these common specifications: Tire cord materials: Marked using Pinyin abbreviations - M (cotton), R (rayon), N (nylon), G (steel), ZG (steel radial). Speed ratings: Indicate maximum speed under specified load conditions. Letters A-Z correspond to certified speeds from 4.8km/h to 300km/h. Common ratings include: Q:160km/h; H:210km/h; V:240km/h; W:270km/h; Y:300km/h. Rim specifications: Show compatible rim sizes (e.g., "Standard Rim 5.00F") for practical reference.
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