Mercedes put plans to introduce new race tires at the season the Spanish Grand Prix on hold . Each of the 11 teams will instead try out development tires in the first practice session . The Italian company is also aware it must protect its image both for its road car clientele and also as it hopes to sign a new deal to continue as F1 's official tire supplier . Pirelli wants to change tires to stop delaminations . Mercedes face an Mercedes investigation over involvement in tire test .
Mercedes put plans to introduce new race tires at the season the Spanish Grand Prix on hold . Each of the 11 teams will instead try out development tires in the first practice session . Pirelli wants to change tires to stop delaminations . Mercedes face an Mercedes investigation over involvement in tire test .