Built for people that use a solid rear window. This rack was designed so you do not need to trim or remove the rear window. It mounts on the outside of your window edge. ( If using an aftermarket hard rear window it is possible that mounting holes may have to be redrilled in a slightly different location). Rack is approximatley 20'' x 48''  and is high enough to allow a spare tire in the bed and allow easy removal of bed for maintenance. Suggest that it be mounted by two people.