Never have had buffeting with any of the shields I have ran on many bikes I have ridden well above the ton.
But then, I always set my shield height on line with my seated eye height to a point on a level road surface 50 feet ahead of the leading edge of my front tire.
I will get a bit of buffeting at times, esp when driving into the wind. I think most of this is due to air coming up under the shield. Lowers would probably stop this. Has anyone had any success with the Laminar Lip?
I had the stock screen for a while and now have the sport screen and a full-sized one made by clearview shields Clearview Shields
It's an improvement, but not night and day. I'm only 5'5" but I do experience buffeting somewhere above 60. It may come from the sides around the forks, not sure. I don't like the way the lower guards look, but I'll bet they would help a lot.
I had a BMW R1200RT with an electric windshield (ahhhhh) that would put you in a pocket of still air when raised. Triumph needs to figure this out.
I have all of them and if I'm going to use a non aerodynamic screen it would be the summer screen which is a hard to find bugger.
That being said two years ago I decided to try a long trip with just the fly/sports screen style. It's much better then I thought and I haven't used either wind screens since.