Abstract: A hardtop roof assembly for a passenger vehicle. The roof assembly includes a hard cover over the passenger cockpit. The cockpit cover is completely removable from the remainder of the roof assembly and vehicle and can be selectively secured over the opening above the passenger cockpit or to a rear storage rack for transport with the vehicle. Because it is completely removable, the cockpit cover can also be stored inside the vehicle or left at home if desired. The cockpit cover uses common securing members to selectively secure it over the opening above the passengers or to the rear storage rack. The cockpit cover and storage rack also have corresponding shapes that assume a neat, strong, and compact mating relationship when secured to each other. Additionally, the side edge portions of the cover and storage rack have vertically extending surfaces that abut and substantially mate with each other to add lateral stability and prevent any side-to-side movement of the cover when it is secured to the storage rack.