Mmmmm, 2026 car. It's a strange thing that concepts always look heavier than the cars in reality (although 2026 cars should be smaller and lighter). In general, I like the cars of the latest regulations more than, say, the cars of the previous regulations (they seemed kind of square to me)
Perhaps the most noticeable change is the rear and front wing, which is completely new compared to the previous concept car
In addition, the concept has what we'll call "gills" for cooling in the rear, and the floor has been changed a bit
