8216;Tyre change will have less of an impact8217;

What were trying to do is find the mid ground and thats where were at. The changes required would appear less than first envisaged.

Pirelli said last week,after a Spanish Grand Prix crammed with pitstops and some eye-catching tyre failures in practice,that they would change the structure and compounds of their tyres from the Canadian Grand Prix round seven of 19 in Montreal on June 9.

The move drew criticism from Lotus and Ferrari,the two teams who have most to lose from any changes after adapting their cars to the 2013 tyres more successfully than others including champions Red Bull. Lotus principal Eric Boullier last week likened the changes to shortening the length of a pitch at half time in a soccer match because one team could not run as fast as their opponents. Ferrari,in a Horse Whisperer column on their website,complained of rivals having selective memories when they criticised the tyres.

The sporting regulations state that tyre specifications cannot be changed during a championship season without the agreement of all competing teams,unless it is for safety reasons.

That would cover certain structural changes,with Pirelli eager to rectify a situation where treads on rear tyres have been peeling off 8211; delaminating 8211; without the tyre itself deflating when penetrated by debris.