A window frame assembly for a vehicle has a cage frame segment connectable to a roll cage, a door frame segment connectable to a door having a hinged end and an opening end such that its first end is disposed proximate the opening end and its second end is disposed proximate the hinged end, and a linking frame segment having a first end pivotable about a pivot axis for pivoting the linking and door frame segments relative to the cage frame segment and a second end movably connected to the door frame segment such that the linking frame segment moves relative to the door frame segment as the linking and door frame segments pivot about the pivot axis, the cage, door and linking frame segments together forming a frame. Door assemblies for vehicles, window frame kits for vehicles, and vehicles provided with same are also disclosed.