legal minimum tread depth in the UK for HGV's (above 3500kgs) is
tyre must have a minimum pattern depth of 1.0mm throughout a
continuous band measuring at least three quarters of the breadth of
the tread and round the entire outer circumference of the tyre.
If the grooves of the original tread pattern did not
extend beyond three quarters of the breadth of the tread, any groove
which showed in the original tread pattern must have a depth of at
NOTE: Exclusions from the definition of tread pattern are: - tie
bars, tread wear indicators, any feature designed to wear out
substantially before the main grooves
CAR & PASSENGERS
VEHICLES up to 3500kgs
The legal minimum tread depth for car and similar tyres in the
United Kingdom and the European Community is 1.6mm throughout a
continuous band comprising the central three quarters of the breadth
of tread and round the entire other circumference of the tyre.
Most car type tyres have tread wear indicators, usually at least six
small ribs across the bottom of the main tread grooves, and when the
tread surface becomes level with these ribs the tyre is at the legal
limit and must be replaced.
Simple and cheap gauges are widely available to give an acceptable
guide to tread depth.
One of the features of tyre tread features of tyre tread pattern
design is to give good grip in wet conditions. Generally speaking
available grip reduces as the tyre wears or as the road surface
water depth increases and you should reduce speed in such
The 1.6mm MINIMUM
LIMIT APPLIES TO: CARS AND
up to 8 seated passengers - not including the driver MOTOR
VEHICLES & LIGHT TRAILERS
(including caravans) up to 3500kg gross vehicle weight