Question 6598
What does it indicate when a tire is marked with the letters "M+S"?
- That it requires special inflation.
- That it is a tubeless tire.
- That it is a special tire for mud and snow.
Show answer and explanation
Correct answer: That it is a special tire for mud and snow.
M+S stands for the English words “mud and snow.” It identifies a tire designed for those surfaces. That marking alone does not guarantee it has been tested in snow; a tested winter tire also carries a mountain-and-snowflake symbol, the 3PMSF. It does not mean the tire is tubeless or needs special inflation. In the image, the sidewall has the M+S marking.