How To Check Mfg Date On Tires

In particular, the first two indicate the production week, and the final one refers to the year. The final four characters refer to the date code and stand for the date of production. This reading applies to any tire produced since 2000. The longer number set is more widely known on all tires after the year 2000. This is the common and reliable way to read your complete tire specifications like the time and the place of production. If you are an inexperienced driver, you may wonder about the meaning of the number and letter series on your tire sidewall.

What does XL mean on a tire?

Whether you own a full-sized or donut spare, in most cases they will not see much use. These tires are only used in emergencies, so often they are neglected during inspections. Do not forget about them since they will save you when the time comes.

It is very common for one of these tractors to have parts with casting date codes that don’t exactly match. The backlog in holding areas for different parts could vary significantly. Serial numbers were stamped in sequential order after passing QC, but they were not maintained in any particular sequential order for final assembly. The Tire Width is a measurement of the tire, sidewall to sidewall, in millimeters.

Some Common Misconceptions About the DOT Code for Tire Age

Metric sizing on off-road tires is typically preceded by letters. In the size LT285/70/R18 on this Nitto Ridge Grappler, LT denotes the tire is made for a light truck. If the numbers were preceded by the letter “P,” it would mean the tire was made for a passenger car. The next set of numbers, “285” denotes the width of the tire’s tread, in millimeters. The second set of numbers, “70” in our example, is the aspect ratio of the tire, or 70% of the total width of 285mm.

Manufacturers constructing new molds for a new plant should be able to comply with the new TIN requirements at no additional cost. For existing plants, new tire manufacturers will be required to modify any molds still in service in 10 years to accommodate a three-symbol plant code and a 13-symbol TIN. We estimate that this cost could be spread out over all tires produced over a 13-year period, resulting in an increase in cost per tire of less than one cent.

The letter is the speed rating, or the maximum speed the tire is built for. As an example, a tire rated 90R could safely carry 1,323 pounds and travel at 106 mph. Consult a load and speed index to find out what your tire’s specific rating means. It similar to the load rating of my Mustang tires being much higher than the vehicle weight.

If the test shows that the test tire will last the same amount of time as the reference tire then it gets a rating of 100. If it is expected to last twice as long as the reference tire then it gets a rating of 200, etc. The thing is that manufacturers may not over report the results but they are allowed to under report them. In other words, if the test results show a rating of 500, the manufacturer is allowed to report 400, but it may not report 600.

If you do so, it is possible that you will not be eligible for warranty benefits. Consequently, store your receipts in a safe location and avoid any confusion by double-checking your DOT code. Keep in mind that the last four digits of the code represent the date on which the tire was produced. The first two digits of the DOT code can be used to determine the week in which the product was manufactured.

Try to be consistent with checking and adding air pressure. Each Brand will have their own maximum years of service for an RV Tire – the average maximum seems to be in the 7 year range. The date code will be on it’s own oval, 4 numbers , the first two will be between for the week of production, and the second tow numbers will be the year. For example, if your 4782K is in it’s own oval, the date would be the 47th week of 1982. The wifes 4runner has Nitto terragraplers and are wearing decent but since she will never see off road it will get a HT tire when it needs tires.

How to find out the year of manufacture of a tire: where is the production date

The ratings are AA, A, B, and C, with AA being the best. There are numerous organic and natural materials used in the construction of tires, including rubber. Like all organic materials, the rubber compounds in a tire will degrade with time, and this is no exception. When there is no DOT number on the sidewall of a tire, it implies that the tire does not meet all of the requirements of the United States.