六年是大限。网路文章和许多车辆制造商均建议不要使用任何六年以上的陈年（新）轮胎，橡胶老化是主因...

When shopping for a new set of tires take a look at the tires themselves. You will notice that on the sidewall there are a series of numbers in front of the word “DOT.” If you see the number 1214 that means it the tire was made on the 12th week of 2014.