Indications of wear are the TWI points.
-TWI is an abbreviation of the English word meaning "tire surface wear indicator" At the side of the tire, there are 4 ~ 6 triangular points to indicate the point of the tread rubber wear limit.
- Corresponding to those triangles, on the surface of the TWI tire are small ridges floating in the groove of the tire flower. When you see that your tires are worn out, these are the times when you should replace them with a new one.
-When the tire is torn, broken but could not repair.
-The tire has cracks around it due to aging.
-The tire is bulged 1 part.
-The tire appears cracks along the circumference of the tire due to insufficient air pressure for a long time of use.
For your safety, change the tire when your tires meet these situations