Can wheels help with under car pressure? Like fans blowing away from the car.
If you are talking about using angled wheel spokes to create more downforce to help the cornering, you must be talking about a high performance vehicle. On a high performance vehicle you also want the biggest brakes possible. This would need big rotors that would fill the inside of those wheels.
You could move the brakes inboard, but not with a widw engine.
Much easier to add downforce with wings.
Don’t forget more downforce is not always a good thing, It increases drag which hurts top soeed and fuel economy and puts more of a strain on the powertrain.