Where is the 6-digit number on the tire?

[SophiaFitz]

The 6-digit number on the tire is located on the sidewall of the tire. Most tire model markings appear in formats like 215/70R15. The meanings of these numbers are as follows: 215 indicates the tire section width in millimeters, typically ranging between 145mm and 285mm in 10mm increments; 70 represents the aspect ratio, which is the ratio of the tire sidewall height to the tire section width. Tires, commonly referred to as such, are generally made of wear-resistant rubber materials and come in two types: solid tires and pneumatic tires. Pneumatic tires consist of an inner tube and an outer tire. Manufacturers usually set the service life of tires at 3 years. If a vehicle is driven 20,000 kilometers per year, replacement may be considered after 2 to 3 years.