The Lippert Lets' Go Aero Jack-It Bike Carrier installs over the tongue jack on the trailer's A-Frame, which is the softest riding area on the frame, to free up your travel trailer's rear hitch/cargo area. It also allows you to see your bikes from your rear-view mirror as you tow. The BikeWing safely and securely holds two bikes by the wheels using the adjustable wheel cradles and SwayStop straps. This adds natural balance, stability, and sway control. Foam bumpers and the SwayControl system enhance the rack's natural stability and protect the bike finish. The PowerTower's design protects your tongue jack from impacts from foreign objects.