How Many Months Do Tires Count as Stock Tires?

[StAshley]

Tires are considered stock tires only after exceeding 1 year. The following introduces how to identify the tire production date and the storage of idle tires: Identifying Tire Production Date: There is a set of numbers on the outer sidewall of the tire. The last four digits after the indicated mark represent the production date, with the first two digits indicating the week of the year and the last two digits indicating the year. For example, if the last four digits are 0807, it means the tire was produced in the 8th week of 2007, i.e., late February 2007. Storage of Idle Tires: Tires should be stored in a dry warehouse, avoiding exposure to sunlight and rain, and should not be overly ventilated. Large-scale tire warehouses should be equipped with thermometers and hygrometers, with temperatures controlled between -10 to +30 degrees Celsius and relative humidity ideally between 50% to 80%. The storage location should be away from heat sources, power generation equipment, and areas that can produce ozone to prevent accelerated oxidation of the tires.

[Max]

Having driven for 40 years, I deeply understand the importance of tire safety. Tires stored for too long can easily age and deteriorate. Generally speaking, tires stored for over 6 months are considered stock tires, as the rubber hardens, loses elasticity, and reduces grip, especially on wet or slippery roads where they are prone to skidding or even bursting. I've personally seen a friend buy promotional tires that had been in stock for 8 months, and they nearly caused an accident when they burst on the highway. Checking the production date is simple—look for the DOT code on the sidewall of the tire. A four-digit number like 3521 indicates the 35th week of 2021. It's best to install new tires within six months of their production date, and regularly checking tire pressure and for cracks is wise. Safety comes first—don't buy a hazard just because it's cheap. I recommend purchasing and replacing tires at reputable stores.

[CeciliaRose]

As the only driver in the family, I have to be very careful with my budget. The inventory time of tires directly affects both my wallet and safety. Tires stored for over six months are considered inventory tires, as the rubber oxidizes and becomes less durable. Replacing them too early is a waste of money. Last year, I bought a set of tires that had been in inventory for ten months because of a discount, but they cracked within a year, costing me extra money. Always check the DOT code for the production week and year before buying, and prioritize tires manufactured within the last six months. Also, pay attention to storage conditions—tires stored in dry, dark places age more slowly, but avoid those stored for over twelve months. Make it a habit to check the date during every maintenance check—it ensures safety and saves money in the long run, a win-win situation.

[LeKarter]

From the perspective of tire manufacturing principles, rubber aging begins the day they are made, with UV light and oxygen attacking the molecular chains. Be cautious with tires stored for over six months, as performance declines, such as slower steering response or tread deformation. With over 20 years in auto repair, I often see increased cracking in tires stored for 8-10 months. Regularly check tire pressure, and storing new tires below 25°C can slow aging. When choosing, prioritize tires produced within the last six months to ensure stable and efficient driving.