Independent research performed by the Motor Industry Research Association
(MIRA) has provided convincing new evidence that worn tyres significantly
increase the chances of having an accident on wet roads by increasing the
The test results showed that significant increases in braking distance began
to appear when the tyre was worn down to 3mm. Although the legal minimum
UK tread depth is only 1.6mm, this new research showed that tyres with a
3mm tread had a 25% better performance than those at 1.6mm in wet conditions.
In terms of braking distance this represents an extra 8 metres (25ft). In
one test, where a new tyre with a tread depth of 8mm was compared to one
with only 1.6mm the braking distance increased by 13 metres (42.25ft) –
the equivalent to double the length of a typical living room.
On the back of this research, the road safety organisation Roadsafe is planning
to launch an autumn campaign to educate motorists on tyre safety and encourage
more frequent tyre replacement. Point of sale material with the headline
“Don’t chance it. Check your tread” will be available
mid July to help drive the message home.