The In Focus team found many of the tires on Maryland store shelves have been sitting there for years.
READ MORE | Local shops sell years old tires as new
Safety engineers say depending on how they're maintained and where they are used, tires can begin to age and lose their elasticity after just six years.
The tread can begin to separate even though the tire may never have been on the road and appear to be perfectly new.
No current law, or industry standard, prevents the sale of aged tires. Our investigation raised a lot of eyebrows here in Baltimore. And it also got the attention of ABC News chief investigative correspondent Brian Ross.
Watch the video above for more.