Abstract: A vehicle carrier rack assembly for mounting upon the roof of the vehicle includes a cooperative clamping assembly for releasably mounting the carrier rack upon a vehicle roll bar. The rack assembly may further include at least one grommet assembly mounted at a hole formed in the vehicle roof and passing therethrough, in water-tight relationship, a portion of the cooperative, releasable engagement assembly for the vehicle rack. In other embodiments, the rack is hinged to pivot between a first position adjacent the vehicle roof and a second position spaced therefrom, e.g., to facilitate removal and replacement of the vehicle roof. A ladder may be mounted to the carrier rack at the rear of the vehicle to similar purpose.