The brake ducts are revised and are a bit smaller now bearing in mind that the pull-road pick-up point is under the brake duct this solution would improve aerodynamic efficiency adding a lot to performance:
The increased wheelbase by moving the front wheels forward creates more space between the front of the sidepod and the front tires giving a better opportunity to control the front wheel wake therefore reducing its negative effect on the leading edge of the underfloor:
The radiator inlets are slightly more integrated with the body surfaces which will keep the airflow intact in this area. Also, the radiator inlet area is larger than last year mainly for a better aero flow but secondly from the thinking that it could be a competitive season and that when running in traffic you need to make sure you can cool the car properly without having to open up the engine cover gills, something that comes along with a drag penalty:
Having larger radiator inlets means there needs to be a larger exit as well and knowing that the air cannot be pushed through the radiators instead it should be extracted from the outside by creating a pressure drop. To achieve this they incorporated small openings along the engine cover shark fin similar to that of the Alpine design last season:
The SF25 has retained the single bib design which helps to keep the aerodynamic activity at the floor entrance much simpler. Then looking at the barge board fence we can see the tip is lower and tilted outwards to increase the front
tyre wake. Further down it has a multi-step trailing edge design acting as a vortex generators thus producing outwash to improve extraction of air flow around the floor fences. The second most inbound fence extends past the floor's leading edge to direct down-washing air flow onto the floor's upper surface. Coming a bit back the SIS bulge is much more prominent compared to last year's SF24. Aerodynamically this directs air flow towards the floor edge and diffuser. The floor edge itself has been revised from the positioning of the metal brackets which connect the floor itself and are repositioned compared to the 2024:
A reshaped double mouse hole which feeds clean air to the diffuser:
At the rear, the pull rod suspension top wishbone forward leg is mounted really low, they are probably going for
more anti-lift to keep the car's rear end stable and low under breaking:
