Local 2 Investigates a Houston company selling tires that some say are putting your safety at risk.

Tire failure causes an estimated 11,000 crashes every year in the United States.

That's why Local 2 consumer expert Amy Davis is taking you undercover to expose why a good deal on tires can end very badly.

"Clearly I went in not knowing anything about cars and tires," Jetrice Gardner told Davis after she purchased two used tires from 713 Used Tires on the Southwest Freeway near Bellaire.

The company's website claims their used tires have a tread count ranging from 50 to 85 percent.

Tread count refers to how deep the tire tread is. New tires have a 100 percent tread count.

"One of the sales representatives told me 'Most tires have about 97 to 98 percent threading.' So I'm like 'Ok. It's a deal,'" said Gardner.

But the deal soured when Gardner got in her car.

"I noticed that as I'm driving, my car, every time I turn, it's making this weird noise," Gardner explained.

A check of her tires by AAA-Certified technician Scott Miller revealed one of the tires she purchased was a 2003. The other was made in 1994.

They were weather-worn, cracked and, according to our expert, simply unsafe.

"I wouldn't put this tire on a vehicle," said Miller.

Out $103.40 and still in need of tires, Gardner worried she wasn't the first to fall for the sales pitch at 713 Used Tires.

"I think they've probably done this before," she said.

But would they do it again? We sent a producer wearing a hidden camera to find out.

"So what year are we talking for these tires?" asked the KPRC producer, wearing a hidden camera.

"Huh?" replied an employee selling her used tires.

"What year?" the producer asked again.

"Year?" the guy responded with a confused look on his face.

"For the tires. What year are we talking?"

"What do you mean?" asked the employee.

"Yeah, they're used… so what year are they?"

"The tires don't have a year," he finally said.

After much prodding, they told her the tires they picked for her van were made in 2000 and 2001.

"Sixty percent life," another salesman told her.

"Sixty percent life?" our producer responded.

"Yeah," he said.

"What does that mean?" she asked.

"It means that's how much tread," the employee answered.

But Miller said the tires our producer left with for just under $200 were not as advertised.