A retractable wheel carriage for use on a vehicle bench seat floor latching mechanism, said retractable wheel carriage comprising a housing adapted to mount on the floor latching mechanism, connector means for connecting the housing to the floor latching mechanism, first and second caster brackets, each pivotally mounted on said housing, a caster mounted on each caster bracket, a link pivotally connected between said first and second caster brackets, and resilient means connected between said first caster bracket and said housing for urging said casters downwardly, wherein said connector means including mounting bracket means including a first and a second bracket, each having a hook end adapted to hook onto a lower edge portion of the floor latching mechanism, and said housing includes a clamp end adapted to clamp onto an upper edge portion of the floor latching mechanism, and fastener means between said housing and each of said first and second brackets for interconnecting said housing and said brackets.