If you transport bikes on a spare- or hitch-mount Thule rack, the No-Sway Cage Accessory is the key to keep up to tow bikes from swaying at highway speed or on bumpy roads. The two accessories are crucial to your peace of mind whether the trip takes you to a favorite evening trail or on a cross country bike adventure. *Here's a tip: place a few strips of moleskin or weather stripping on the accessory where it sits against from your seat tube if you're worried about paint chipping.