Using this Thule Camber 4 - bike hitch rack is a breeze. First, decide whether you'll use the 1.25 - inch or 2 - inch hitch receiver and attach the rack to your vehicle accordingly. When loading bikes, place them in the cradles one by one, using the ratcheting cradle strap to secure each bike tightly. Make sure there's about 7 inches of space between bikes for safety. If you need to access the rear of your vehicle, use the tilt feature. When you're done using the rack, fold down the arms for easy storage. A few things to keep in mind: Don't exceed the 37.5 - lb weight limit per bike. When transferring the rack between different hitch receivers, ensure a proper fit. For maintenance, regularly check the ratcheting cradle straps for wear and tear. Clean the rack with a mild soap and water, and dry it thoroughly to prevent rust. That's all you need to know to get the most out of your Thule Camber bike rack.