Abstract: A vertically storable trailer embodying a flat, triangular frame has mounted thereon a container bottom for receiving a load and a container top that is sealingly and lockably engageable with the bottom for securely enclosing the load. The top and bottom have outwardly sloping forward and side walls to permit nestably storing the top in an inverted position within the bottom to reduce trailer storage space and a rearwardly facing flat end wall of the bottom is normal to the frame to facilitate tilting the trailer thereon to reduce floor storage area requirements. Wheel suspension assemblies include a pair of tubes, one end of each tube being pendulously attached to the frame adjacent either side of the container bottom. A wheel is rotatably journalled to an axle affixed to each tube adjacent its free end and within the free end is mounted a shock-absorbing resilient load sustaining unit.