a utility trailer , as for example may be towed behind a vehicle , is disclosed . a description of the assembly , reconfiguration , expandability and folding of the trailer is described . the trailer is easy to store , manufacture , reconfigure and disassemble in large measure due to the unique repeated nature of the main frame components . the frame components can also be removed from the trailer assembly and reconfiguring into different useful devices . the reconfiguration requires minimal additional hardware and is further simplified by the locking mechanisms , located at the connection locations of is each frame panel . the trailer / accessory system also offers advantages over other trailers in that it may be maintained by replacement of common panel components . the wheel assemblies are also collapsible to further reduce necessary storage space and shipping requirements .