How to keep your tyres safe - Pictures

Hi-tech timing equipment uses satellite technology and is set up to accurately work out stopping distances when the brakes are applied

When fitted with 1.6mm tread tyres rather than 3mm ones, Renault Clio takes much longer to come to a halt on wet tarmac track. as a result it is unable to avoid smashing into our soft block wall at the end of the run.

We simulated conditions of motorway in wet weather at Warwickshire test track. At 70mph, performing an emergency stop can result in aquaplaning - particularly if tyre tread is worn

Tyres from Ford Focus (left) and Escort reveal how wheel sizes have grown since the Nineties. Current tread law dates from 1992 and experts say it needs updating for modern rubber.