 The competition led to the development of a tyre where more of its surface area came into contact with the road surface providing the driver with more grip.This increased the top speeds of cars during pre-season testing and drivers set lap times below 2000-levels to nullify the effect of the reduction in aerodynamic performance and downforce.It raised concerns within the sport about grooved compounds becoming illegal slick tyres; the FIA declined to enforce a regulation that mandated Michelin and Bridgestone to restrict the wear of their tyre compounds.