The FIA has announced that a stricter test for rear wing flexibility will be introduced starting from the Chinese Grand Prix. This decision follows an analysis of footage from practice sessions at the Australian Grand Prix, where teams used cameras to monitor their cars’ movements on track.
Although all cars in Australia were confirmed to be within the current rules, the FIA determined that a tougher test is necessary for the upper rear wing from the next race in Shanghai.
The new rule, introduced under Article 3.15.17 of the 2025 regulations, states that when a 75kg force is applied to either end of the rear wing, the gap between the main wing and the flap must not change by more than 2mm. From the Chinese Grand Prix, this limit will be tightened to just 0.5mm, with a small tolerance of 0.25mm due to the short notice.
Teams were informed of this update on Monday, March 17. The FIA confirmed that all cars passed the tests in Melbourne, meaning they complied with the current regulations.
The Chinese Grand Prix will take place from March 21-23, marking the first F1 Sprint event of the season.
