By motorwatts 
In a swift response to footage captured in Melbourne, the FIA has announced an immediate clampdown on rear wing flexibility. The new technical directive will come into effect this weekend at the Chinese Grand Prix in Shanghai, as the governing body seeks to close a loophole that teams have been exploiting for an aerodynamic advantage.
Extra high-definition cameras were fitted to several cars during the Australian Grand Prix practice sessions. These cameras, along with reference markers on the cars, allowed officials to closely monitor how much the rear wings flexed under on-track conditions. Based on the analysis of both the on-track footage and static deflection measurements from the FIA garage, it was determined that the current regulation – which permits a slot gap variation of up to 2mm under a 75kg vertical load – is too lenient.
From Shanghai onwards, the FIA will reduce this tolerance dramatically. The new directive mandates that the slot gap – the distance between the mainplane and the rear wing flap – must not vary by more than 0.5mm when subjected to the same load. However, due to the short notice given to the teams, a temporary tolerance of 0.25mm will be allowed for the Chinese GP only, meaning the effective limit for this round will be 0.75mm before reverting to 0.5mm in subsequent races.
The FIA emphasized that all cars competing in Melbourne were found to be compliant with Article 3.15.17, and none were penalized despite the flexible behaviour. Nevertheless, mounting evidence of “mini-DRS” tactics—where teams use subtle rear wing flexing to gain a straight-line speed advantage—has forced the regulator’s hand. Red Bull’s technical director, Pierre Wache, claimed that despite the tightening of regulations, rival teams such as Ferrari and McLaren were still attempting to exploit the gap for performance gains.
In addition to these rear wing measures, the FIA is set to introduce tougher stress tests on front wings later in the season, starting from the Spanish Grand Prix, as part of an ongoing effort to standardize aerodynamic performance and ensure fair competition.
While all teams have been given notice, the short turnaround means engineers will now be racing against the clock to adjust their designs. As the grid heads to Shanghai, the effectiveness of these new measures will be closely watched by teams and fans alike, potentially reshaping the competitive landscape in the months ahead.