I have knowledge to this question when it comes to Harley's. This new shield is designed just like our Ultra for Harley's. The Klock is a great shield in its design. It is similar to our X-Stream shield for Harley's. The curvature of it allows wind to cut across and "split" over hips in the shield. This allows great aerodynamics and also creates a downward force to the front of the bike adding more stability at higher speeds. One downside to this design is wind protection. Especially for a passenger. While our Ultra design is a simple stock shape, but with our re-curve. This design provides excellent wind protection for both the rider and the passenger. Size is important, but with this shield not so much as it is easily adjustable. You'll be able to move it up and down to find that sweet spot where you are looking over the shield but fully protected as if you're looking through it.