The FIA has taken a pro-active step issuing a new Technical Directive regarding the rear wing from Chinese GP onward, after monitoring during Australian GP.
Ahead of the 2025 F1 season start, the FIA issues a technical directive noting about flexi-wing monitoring starting from the first race for all of the team’s rear wings. The front wing load test is to begin from Spanish GP onward, which remains on schedule but a more robust one will be done.
As for the rear wing, the FIA had cameras installed on cars during last weekend’s Australian GP and found that they need to continue on with much tougher test. As a result, they are to introduce one from Chinese GP onward, especially on the upper rear wing.
The FIA states that when they put up a 75kg load test on the rear wing, the slot gap should not be more than 0.5mm from Chinese GP onward, which is down from the 2mm required in the original regulation for F1 2025. The tolerance level is set at 0.25mm.
The F1 teams were informed about the same on March 17, as the FIA added that all of the 10 teams were in compliance with Article 3.15.17 of the technical regulations, which means all of the 20 cars were legal to drive during the Australian GP at Albert Park.
“As has been previously communicated, between the end of the 2024 season and the start of the 2025 season, the FIA exercised the authority it is granted under Article 3.15.1 of the Technical Regulations to introduce either new or more challenging load-deflection tests for the front wing (from Race 9, Spanish Grand Prix), the upper rear wing, and the beam rear wing,” the statement from FIA said.
“In addition, the FIA requested to the teams to use cameras in Free Practice Sessions to monitor the on-track deformations exhibited by the cars during the Australian Grand Prix. Having analysed footage from the rear wing deformations combined to the static deflections measured inside the FIA garage in Melbourne, the FIA has concluded that sufficient grounds exist for a tougher test to be introduced from the forthcoming Chinese Grand Prix on the upper rear wing.
“More specifically, Article 3.15.17, introduced in 2025, states that if 75Kg of vertical load is applied on either extremity of the rear wing mainplane, the distance between the mainplane and the flap (also known as “slot gap”) must not vary by more than 2mm. From the forthcoming Grand Prix in Shanghai, this limit will be reduced to 0.5mm. Due to the short notice for Shanghai only a tolerance of 0.25mm will be added to this new limit.
“The Teams were informed of this revised test early Monday 17th of March. The FIA wishes to further confirm that during the Melbourne event all cars tested against the requirements of Article 3.15.17 and found to comply, therefore all cars raced in Melbourne were deemed to be legal,” summed up the statement, as it remains to be seen which teams are affected by such change.
Here’s earlier news on flexi wing test
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