More than 40% of drivers are driving with illegal tyres, according to a new survey.
The survey by discount firm MyVoucherCodes revealed that 41% of respondents admitted to currently driving with tyres that had less than the minimum legal tread-depth.
Motorists said the main excuse for driving with illegal tyres was the expense of buying new ones.
The law requires a minimum of 1.6mm of tread across the central three-quarters of the tyre, around its entire circumference.
Drivers who fail to comply face an increased risk of being involved in an accident, as well as a fine of up to 2500 and three penalty points for each illegal tyre.
It is recommended that you change your tyres with a 3mm minimum tread-depth, because this is the critical measurement where stopping distances begin to increase.
MyVoucherCodes says Manchester has the highest percentage of drivers with illegal tyres
Top 10 illegal tyre hotspots
1 Manchester 15%
2 Hull 14%
3 Leicester 11%
4 Plymouth 9%
5 Birmingham 7%
6 Liverpool 5%
7 Newport 4%
8 Portsmouth 3.5%
9 Bristol 2.5%
10 Glasgow 2%