Collapsible step platform and receiver post

A receiver post to be inserted into a hitch receiver, the receiver post comprising:

• a receiver post body having a top panel, the receiver post body disposed around a longitudinal axis, a bottom panel spaced from and opposed to the top panel, the top panel and the bottom panel being substantially parallel with the axis, a center panel extending from the bottom panel to the top panel and substantially at a right angle to the top and bottom panels;
• a plurality of cylinders disposed in the receiver post body to be at an angle to the axis, each of the plurality of cylinders extending through the center panel, a respective support structure provided for each of the plurality of cylinders, each of said support structures including a top vertical member in parallel with the cylinder and extending from the cylinder to the top panel and a bottom vertical member in parallel with the cylinder and extending from the cylinder to the bottom panel, each of said support structures being spaced apart from adjacent support structures, the support structures adapted, upon impact being applied to the receiver post, to collapse, thereby absorbing the force from the impact.