For optimum air the top of the shield needs to level with your mouth and no higher than the tip of your nose when in a relaxed riding position. It’s amazing what a difference just an inch or two can make. Remember if it’s too low you’ll get too much turbulence or if too tall the top of the shield will be in your line of sight.

If you’re not certain it’s always better to be on the high side with light colors in clear, light gray, and green which are all DOT approved for day or night time riding. If you receive a shield that’s too tall just mark it & send it back at your expense. We will make a one time no charge adjustment including courtesy shipping for the ultimate in custom shield height. With dark gray or opaque black it’s always better to be on low side. (Must clearly see over the shield). Unfortunately dark colors and best air are a trade off. Dark colors need to be below the mouth down towards the chin due to reduced vision for road hazards especially at night or in low light conditions.

Sit on your bike in a normal riding position with the straight edge that’s been securely taped to the center of the shield. For best results you will need an extra set of hands. Place the string in your mouth and hold secure with your teeth or lips. Pull the string to the straight edge so that the string is in a level position that is parallel or perpendicular to the ground. Determine how much higher or lower you need to go based of the existing shield and your measurements. It can be slightly above the mouth and no higher than your nose for lighter colors or needs to be slightly below your mouth for dark colors. Width is dependant on your body type and what you’re looking for. Riders with larger shoulders and upper torso usually need more width for better torso and shoulder coverage. Medium to smaller riders may find that the stock width shield works just fine.