What do the dots on tires mean?
1 Answers
Due to limitations in manufacturing technology, tires cannot achieve absolute balance during production. Therefore, tires are tested before leaving the factory, and during this process, two dots are marked on them. The meanings of the dots on tires are as follows: 1. Solid red dot: Represents the point of maximum longitudinal rigidity on the tire, which is the location with the most vibration. 2. Yellow dot: Represents the static balance point of the tire, which is the lightest position on the tire. Additional related information is as follows: 1. Wheel hub: A wheel consists of three parts: the tire, the wheel hub, and the valve. Like the tire, the wheel hub also has "light points" and "heavy points." Some wheel hubs may have a blue/red/white dot, which usually indicates the lightest position on the hub. 2. Treadwear index (Treadwear): This is typically imprinted on the sidewall of the tire in numerical form. A higher number indicates that the tire is more wear-resistant. Generally, the treadwear index for household car tires falls within the range of 240-400. Manufacturers often label these tires with features such as comfort, quietness, and wear resistance. However, performance tires with stronger grip usually have a treadwear index of 200 or below.