The 2 Second Rule
Thinking Distance + Braking Distance = Stopping Distance
Stopping Distances
The UK Speed limits for various types of vehicles on various types of road
Your tyres are the ONLY thing keeping your car in contact with the road.
Allowing these to become worn out, your ability to remain on the road safely, becomes vastly reduced.
The more tread you have the safer you are.
Although the minimum legal tread depth for tyres in the UK is 1.6mm, the difference in stopping distance in the wet compared to a tyre that has 3mm of tread is huge!
Tests conducted have shown that a tyre with 3mm of tyre tread would stop within 91 metres when travelling at 70mph.
A tyre with the legal minimum of 1.6mm would take 135 meters to stop at the same speed.
Which roughly means it would need an additional 11 car lengths to come to a stop!