What are the best options for a two-bike rack that is easy to install and secure for transporting bicycles?

The best options for a two-bike rack that is easy to install and secure for transporting bicycles are hitch-mounted racks and trunk-mounted racks. Hitch-mounted racks are easy to install on a vehicle's hitch receiver and provide a secure hold for bikes. Trunk-mounted racks are also easy to install and secure, but may require additional straps for stability. Both types of racks are available in various styles and price ranges to suit different needs and preferences.