A collapsible roof assembly for a vehicle includes a roof, an actuating linkage system, and a main bearing. The roof is movable between closed and opened positions relative to the vehicle body. The actuating linkage system has a guide rod connected at a first end to the roof for moving the roof between the closed and opened positions. The main bearing is connectable to the vehicle body. The main bearing has first and second bearing plates each having at least one corresponding connecting section. The corresponding connecting sections are connected together such that the first and second bearing plates are joined together with surface regions other than the corresponding connecting sections spaced apart from one another with a parallel spacing delimited by a cavity. The guide rod is articulately connected at a second end to the main bearing via a bearing pin extending through one of the corresponding connecting sections.