New Idea?
 

So I noticed a bus the other day, it had fur!

Well not exactly fur, but the wheel arch was filled with thick nylon(?) broom bristles. When the bus tilts (air ride) the tire tucks past them, and while turning the wheel just pushes through the bristles.

I was wondering if any eco-modders have tried similar methods? Using durable and flexible bristles to fill in the wheel well gaps. The ones on the bus were black and it was rather discrete if you ask me. Especially when compared to something like wheel skirts!

Those bristles are installed to catch the water spray generated by the tires that would normally come boiling out of the wheel wells when the bus was driving on a wet road that would obscure the vision of any drivers following the bus. They do for the sides what the mudflap does for the back of the wheel well. It may help the aero slightly, but nowhere near as much as installing a wheel well skirt.

Ahhhhhh...I wonder if it would help aero at all? The tires would pretty much wear their own into the bristles, and then you would have a shaggy form fitted gap filler!