One of the largest aerodynamic structures on the car, air flows over and around the rear wing, pushing the car down toward the racetrack and providing mechanical grip, which is crucial for cornering performance. A stable rear also improves corner turn-in by limiting sliding; the AMR25’s rear wing has been designed with this in mind.

Rear wings create a wake, increasing air resistance—also known as drag. The smaller the rear wing, the lower the drag and the higher the car’s straight-line speed. A bigger rear wing will generate more downforce but at the expense of higher drag and lower straight-line speed.

The Drag Reduction System (DRS) is found on the rear wing. At specified points on the circuit, a driver can trigger the DRS via a button on their steering wheel and open a flap on the rear wing. This reduces drag as air passes through a gap, boosting straight-line speed and increasing overtaking probability. During a race, drivers can use DRS when they’re within one second of the car in front at the point of DRS detection.

This season, the minimum gap permitted in the rear wing when the DRS is closed has been reduced from 0.39–0.59 in. to 0.37–0.51 in. When the DRS is open, the maximum gap permitted is 3.35 in.