I'm 5'10". I was getting a lot of buffeting and noise, so while riding down the road, I would hold my hand over in the area the deflectors cover and there was a lot of strong air coming through that area. The deflectors have blocked that wind flow and the difference is unbelievable. I guess it's one of those things that is hard to describe. All I know is now I'm riding in calm air and it is a lot quieter. Maybe someone else can chime in about the deflectors and explain it in a different way.