I recently installed a ZG ST windshield on my bike. What a difference it makes with the air flow. The bonus is the gas mileage. For my 60 mile commute I was getting 43 mpg. This is mostly interstate running 70 - 72 mph. When I installed the shield I had about 3/4 tank and got 47 mpg. I filled up this morning and got 51 mpg. Now mind you I'm riding fairly gentle, no 9k shifts or 120 mph flybys. Needless to say I'm very pleased.