Compared to steel hitch racks, the Inno Aero Light are made with an aluminum post, is lighter weight for dramatically easier installation and improved fuel economy. Foot pedal release makes it easy to tilt the rack down, even when fully loaded with bicycles, for easy access to rear of vehicle. When not loaded up with bikes, the hitch bike rack support arms can be folded down with the simple pull of a lever for improved clearance when parallel parking or squeezing into a tight garage. The soft rubber cradles won"t leave scratches on your bikes and the anti-sway cradles will hold bikes firmly to prevent them from banging against each other or the rear of your vehicle, even on bumpy roads. For theft prevention, the Inno Aero Light includes a burly, integrated cable lock and key system. Carrier also locks to trailer hitch using the included hitch pin lock. Inno INH301 hitch bike rack carries up to 4 bicycles while the Inno INH302 hitch bike rack carries up to 2 bicycles.