The Indy 500 wing consists of a mainplane with no flaps. There are no restrictions on the angle of the mainplane. This configuration is used only at the Indianapolis Motor Speedway. The single-element wing is used to trim and balance an IndyCar Series car as it travels through the flat corners at the Indianapolis Motor Speedway.
The 2-plane Speedway wing consists of the standard (-2.5 degree) mainplane with a top flap. The sanctioning body-designated minimum flap angle varies according to track. The two-element wing increases downforce and drag and limits speeds at venues with larger turn radii and higher banking. This configuration is used at Homestead-Miami Speedway, Twin Ring Motegi, Texas Motor Speedway, Kansas Speedway, Nashville Superspeedway, Kentucky Speedway and Chicagoland Speedway.
The 3-plane Speedway wing consist of the standard mainplane with two vertically-stacked flaps. The sanctioning body-designated minimum flap angles vary according to track. The three-element wing provides maximum downforce and enhances the driver's ability to carry speed through the turns. This configuration is used at short tracks such as The Milwaukee Mile, Iowa Speedway and Richmond International Raceway. The three-element wing is also designed for street and road-course use.