Ground-loading vehicle platform for pickup truck

A skate for use with a vehicle platform for a pickup truck and for guiding on a ground surface said vehicle platform, the skate comprising:

• a front wheel-assembly comprising at least one front wheel and a front wheel-axle;
• a rear wheel-assembly comprising at least one rear wheel and a rear wheel-axle;
• and
• a body comprising a bottom side having a mostly flat lowest and central portion, and a pivot couplable to said vehicle platform;
• wherein said front wheel-axle is coupled to said body near a front of said mostly flat lowest and central portion so that said front wheel protrudes from said bottom side of said body, parallel to said mostly flat lowest and central portion, and extending through a width of said body;
• wherein said rear wheel-axle is coupled to said body near a rear of said mostly flat lowest and central portion so that said rear wheel protrudes from said bottom side of said body, parallel to said front wheel-axle, and extending through said width of said body;
• wherein said skate, when coupled to said vehicle platform, rotates in relation to said vehicle platform around said pivot to ensure that said mostly flat lowest and central portion remains about parallel to ground surface so that at least one of said front wheel or said rear wheel makes a first contact with said ground when said vehicle platform is being lowered.