The Moto Offset Adapter does 2 things: Scoots the moto 4" closer to the cab for best tailgate closing ability Offsets the handlebars when running motos close together so handlebars don't touch The Adapter has 2 positions: Angled and Straight. The angled position allows you to run the front tire on the front track to get the bike as far forward as possible. The straight position lifts the bike higher up and scoots the whole moto closer to the cab This is for a single offset adapter. For 3 Dirtbikes: We recommend 2 for beds over 5'5", and 3 for beds under 5'5". For 2 Dirtbikes: We recommend 0 for beds over 5'5", and 2 for beds under 5'5".