What are the blue and red lines on new tires for?
1 Answers
New tires' blue and red lines serve as proof that the tire is indeed brand new and unused. Here is additional information: 1. Tire lifespan: Tread patterns contain wear limit indicators. According to current Chinese regulations, when a passenger car tire's tread depth reaches ≤1.6mm, it indicates the tire has reached its end of life. However, it's generally recommended to replace tires when tread depth reaches ≤2mm to maintain proper water drainage performance. 2. Color meaning: The colors indicate tread width specifications and applicable tire models. These are ordinary paint marks that fuse with rubber during the vulcanization process. Every new tire has these lines, which serve as indicators distinguishing new tires from used or retreaded ones.