Using this Rocky Mounts HighNoon Add - on is easy. First, make sure you have either a HighNoon FC or HighNoon FC Solo. Attach the add - on according to the included instructions. When loading your bikes, keep in mind that the max weight per tray is now 45 lbs. Secure the bike by its front wheel. You can use it with a variety of tire sizes, from road tires to 5.0” fat bike tires, and wheel diameters from 20” to 29”. Just ensure the wheelbase of your bike is between 34” and 52”. As for maintenance, regularly check the connections for tightness. Wipe it down with a clean cloth after use. Remember, this add - on only works with HighNoon FC 2' or Solo, not BackStage, MonoRail, SplitRail, or GuideRail.