But the rate of progress that teams have made in the opening half of this season has made the FIA concerned the original plan – for a 10 percent reduction in downforce – did not go far enough.
So with Pirelli set to run the current tyres for their third year, before the new 18-inch design comes in for 2022, more changes have now been made to the regulations.
It is hoped that the tweaks will mean less load is put through the tyres, and that in turn will not force Pirelli to stipulate ever higher minimum pressures as has been the case this season.
Carlos Sainz Jr., McLaren MCL35, heads into the pits with a front puncture
Andy Hone / Motorsport Images
The main changes still require teams to have a section of the floor ahead of the rear tyre cut away.
However, whereas it was still anticipated that teams might use a limited number of slots on the floor’s periphery to reclaim performance, they will now be prevented from doing so.
As an added measure, to help achieve their downforce reduction goals, the FIA is also making changes to the regulations surrounding the fins on the rear brake ducts and the vertical strakes mounted in the diffuser.
Carlos Sainz Jr., McLaren MCL35 with a 2021 spec floor
Mark Sutton / Motorsport Images
Teams started work on next year's car some time ago, as illustrated by McLaren’s eagerness to test a 2021 style floor during free practice at the Belgian GP.
The Woking-based team hoped this would help it understand how this will affect the balance of the car, and perhaps more critically give it some real world data to corroborate what it has already seen in its simulations and in the wind tunnel.