Abstract: A kit is provided for attaching to a road travelling mobile platform (e.g. a wheeled trailer or a self-propelled vehicle such as a pickup truck or a flatbed truck) suitable for transporting a first vehicle. The kit enables the mobile platform to transport a second vehicle, such as a boat trailer carrying a boat, thereon. The kit includes: a tiltable ramp suitable for supporting a boat and boat trailer thereon. a first support for supporting one portion of the tiltable ramp in an elevated position with respect to the mobile platform; a chain and drum located on the first support for securing the boat and boat trailer to the tiltable ramp; and a second support capable of supporting a long lever arm portion of the tiltable ramp in an elevated position or capable of retaining the long lever arm portion in a lowered position. The first and second supports include connectors for connecting the mobile platform to the respective supports.