Using this Rocky Mounts Splitrail Add - on is easy. First, make sure your SplitRail or SplitRail LS rack is installed properly. Then, attach the Add - on according to the instructions. If you're carrying multiple bikes, you can adjust the tray 4” side - to - side to avoid any interference between the bikes. Secure your bike by the front wheel using the integrated cable lock. When loading bikes, keep in mind that the max weight capacity per tray is 45 lbs. Also, don't use this Add - on with bikes that have fenders. For maintenance, regularly check the cable lock for any signs of wear and tear. You can clean the rack with a mild soap and water solution. Store it in a dry place when not in use to prevent rusting.