FIA Tightens Rear Wing Flexibility Rules Ahead of Chinese Grand Prix

Formula 1's governing body introduces stricter deflection tests following analysis of footage from the Australian Grand Prix.

The FIA has reduced the allowable rear wing slot gap deflection limit from 2mm to 0.5mm, with a temporary 0.25mm tolerance for the upcoming Chinese Grand Prix.
This decision follows analysis of footage from the Australian Grand Prix, where all cars were deemed compliant under the previous regulations.
Flexible rear wings, which can reduce drag and boost straight-line speed, were a contentious issue during the 2024 season and remain a focus in 2025.
The updated regulations aim to prevent teams from exploiting aerodynamic advantages through wing deformation under high-speed conditions.
Stricter deflection tests for front wings are also planned for introduction at the Spanish Grand Prix in May and June.