![]() Those with a kilometre warranty typically range from 40,000 km to 130,000 km. Tire warranties vary, and some tires have no kilometre warranty at all. However, you can get a good idea of how far a tire should travel based on its warranty. Predicting the kilometres a tire will last is where things get a little trickier, as this greatly varies with the tire type, driving conditions, and driving style. Other variables can impact a tire's useful life, like manufacturer defects, but these are flaws in the design and aren’t the norm. Most tires are OK until they reach 1.6 mm, but some winter tires and all-terrain tires recommend replacement at 3.2 mm. Wear is based on tire tread depth, which is the depth of the valley between two tread blocks. The tread on old tires can also become brittle and separate from the tire itself, potentially resulting in a catastrophic blowout. Tire age matters because the rubber starts drying out over time, causing it to harden and lose its grip. However, some experts recommend having them inspected and considering replacement at six years. For example, a tire with "2620" as its last four digits was manufactured on the 26th week of 2020.Ī tire's useful life is about 10 years, according to most tire manufacturers. The last four digits of this code are always numerical and indicate the week and year the tire was manufactured. Since 2000, every new tire's sidewall has a stamped 12-digit code called the tire identification number (TIN) or Department of Transportation (DOT) code. On the time side of things, tires have an expiration date - sort of. ![]() There are two ways to look at a tire's lifespan: time and wear.
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