Just wanted to add a personal experience: My Nankang SV-2 tires (bought Dec. 2017) did not pass this year's inspection, but not due to tread depth - due to age. The inspector called me out on it, showed me the age stamp, but gave me a temporary pass until I put new SV-3s on all around.
So here in the Colonies (USA) the Department of Transportation calls for annual inspections of passenger cars that are not nearly as thorough as MOTs (mostly focused on emissions), but they DO check tire tread depth, appearance AND age, disqualifying any tire over 6 years old.
In fact, Suffolk County, New York, has a local law (
No. 54-2008) which prohibits the sale of tires older than 6 years and will fine the seller $500
What's funny is that our commercial trucks don't seem to have the same limitations - see: https://www.mysafety...re-regulations/
"Unlike passenger cars, which require tire replacement after six years regardless of their tread depth or usage, there are no such regulations for trucks."
Also see this paper on the subject which quotes some interesting studies, numbers and recommendations:
"In August 2007, NHTSA issued a Research Report to Congress on Tire Aging, citing in it analysis of an insurance company’s tire claims reported from 2002 through 2006. The analysis found that 77 percent of the tire claims came from five hot-climate states, including Florida, and that 84 percent of those tire-related claims were for tires over 6 years old."
“Tyres age even if they are used only very little or not at all. A spare wheel which has not been used for six years should be used in emergencies; drive slowly when using such tires."
"NHTSA’s investigation showed that “these tires are experiencing age-dependent fatigue failures that will create an escalating risk of crashes and injuries if they are not removed from service.”"
So it would seem that you don't want to be driving on anything older than 6 years old, no matter how pretty they look.
Edited by [email protected], 29 March 2024 - 03:52 AM.