KITS FOR A TRUCK BED COVER ASSEMBLY

Conversion kits for converting a manually operated roll-up cover assembly for a truck bed to a motorized roll-up cover assembly or to spring assisted roll-up cover, the manually operated roll-up cover assembly including a rollable curtain (1) formed of a plurality of adjacent transverse panels (2) and a housing box (3) adapted to be mounted at the forward end of the truck bed for receiving and storing said rollable curtain, said housing box (3) comprising a hollow transverse rotatable shaft (4) mounted therein.