New research conducted by Confused.com found that in that past 12 months 2.5 million cars failed an MOT as a result of having bald or defective tyres, accounting for nearly a quarter (23%) of all failed MOTs in the UK.
Not only is driving around with defective tyres extremely dangerous, it can also end up costing you money.
Being caught with defective tyres is listed as a 'CU30' offence and motorists can automatically receive three points on their licence as well as a fine of up to £2,500 for each balding tyre.
According to the comparison site's study, almost 9,000 drivers were given penalty points for the offence last year alone, with 10,766 endorsements handed out for defective tyres.
The data revealed the average fine handed to motorists caught with badly worn tyres was £2,700, suggesting that many were driving with more than one defective tyre. What's more, the average number of penalty points issued during these offences was six as opposed to the normal three.
But what is perhaps more shocking is that over a third of the 2,000 UK adults polled by Confused.com said they weren't aware of the dangers of driving with defective tyres, while 35% said they only became aware that their tread depth had surpassed the legal 1.6mm minimum when it had been pointed out during an MOT or service.
Have you ever failed an MOT due to defective tyres?