Dating the age of tires

The full DOT number is only on the outside of the tire.

Ensure your tyres have more than 1.6mm of tread Most new tyres start out with about 8-9mm of tread.When the tread wears, the tyre’s ability to disperse water reduces.These numbers let you decode the date of manufacture of the tire.The first two numbers indicate the week; the last two the year.The issue is primarily about how the inner, “wedge” layers of rubber oxidize.

The stiffening and cracking of aged rubber can lead to the inner layers of the tire delaminating from the steel belts rather than flexing with the steel as the tire rolls under weight.For heavy loads or sustained high-speed operations, increase the inflation pressures according to your vehicle’s recommendations.For maximum tyre life, you should rotate your tyres every 5,000 – 8,000 km, or according to the vehicle manufacturer’s recommendations.For example, 0510 indicates the tire was produced in the fifth week of 2010.Subtract the tire manufacture date from the current date to determine the tire's age.The issue came to a head earlier this year when Maryland debated a bill to require Maryland tire dealers to give consumers a printed statement on the dangers of tire aging whenever they sell a tire that is more than three years past its manufacture date. Should a tire be taken out of service because of age even if it has tread life remaining?