The numbers on a tire sidewall look like an engineering password, but they tell a simple story. They show the tire's width, sidewall height, wheel diameter, construction type, load capacity, speed capability, age, and sometimes winter certification...
The sidewall is your tire's most vulnerable zone. It flexes constantly, it is thinner than the tread, and it contains structural cords that keep the tire intact at speed. That is why many types of sidewall damage are not repairable and should...