GEORGIA -- Most tire makers recommend tires be replaced at least every six years, no matter how you drive on them. That's because the rubber can break down over time.
We found used tires for sale way past that age.
In some cases, even old tires that have been recalled, still for sale.
"He said, 'I am afraid that you will be paralyzed. You will never walk again,' and that was like a death sentence to me. It was like dying."
Carolyn Thorne has spent the past nine years trying to prove her doctor's diagnosis was wrong.
She became paralyzed in a crash in 2004 on a stretch of a Georgia interstate.
"I heard a loud noise and then the truck started swerving."
Thorne's SUV rolled repeatedly: the problem a faulty tire shredded.
It had been recalled more than a year earlier, and she never knew it.
"I was mad as hell that they put me in this chair," she said.
Federal records show Continental Tire recalled nearly 600,000 tires, but recovered less than half.
"The recall system is broken."
Attorney Matt Wetherington said the recall system for tires just does not work. He says 4.5 million tires have been recalled in the past 10 years and less than 1 million have been recovered.
A pick-up truck lost its tread in Camden County, leading to a four vehicle crash and a dead motorcycle driver.
"I was shocked at how preventable these wrecks are."
One problem is those recall tires are ending up at used tire shops.
A producer armed with an undercover camera in Atlanta purchased this Firestone Wilderness tire. It looks new but it is actually 17 years old and part of the most famous recall of all time: Firestone's recall of 2000 and 2001 tires.
"It's a good tire?"
"Very good tire."
"It's not one of those recalls is it?"
This salesman of that tire company says they bought it salvaged from a wrecker operator.
"So I didn't know anything, whether it was a recall or what. He said it was a spare tire."
Potentially dangerous tires sellers and drivers may not know about.
It's important you know how to check your tires including the spare. Look for the DOT number on the sidewall sometimes it will be on the backside of the tire. The last four numbers show the date of manufacture.
In this case, the tire is made in the 48th week of 2010. Tires with only three numbers are older than 2000.