FIA unmoved in worn-tyres row

Following the San Marino Grand Prix, several of the Bridgestone teams argued that some Michelin runners were fitting used rubber for the start of races, enabling them to get around a rule intended to ensure that grooves are 2.5cm deep when the tyre is used for the first time.

Although no official protest was lodged, it is believed the Bridgestone teams are seeking clarification of the rule and are pushing the FIA to make an amendment that would force the Michelin runners to start on new tyres.

If this were to happen it would almost certainly affect the competitiveness of the Michelin teams because the French tyres usually go through a 'drop-off' in performance when used from new.

However, the FIA is thought to be unconcerned by the tactics of the Michelin teams, although it is keen for the grooved tyres to appear less worn at the end of races. Currently cars from both tyre companies are ending races with tyres that have practically been worn down to slicks.

The FIA is of the opinion that if would be better for the image of F1 and the tyre manufacturers if the grooved tyres appeared in good condition after the race.

The full story appears in this week's AUTOSPORT magazine, which is on sale now.