Portable on-tread tire rack

A tire rack system comprising:

• a first base;
• a first plurality of posts extending from a top surface of the first base, each of the plurality of posts having a reduced diameter portion;
• a second base having a plurality of apertures in a bottom surface that removably receive the reduced diameter portions of the first plurality of posts;
• a second plurality of posts extending from a top surface of the second base;
• a plurality of side bars, each side bar extending between two of the plurality of posts, and each side bar having a plurality of apertures;
• and
• a plurality of crossbars, each crossbar extending between two of the plurality of side bars, wherein each crossbar has a first end removably received in an aperture of a first side bar and a second end removably received in an aperture of a second side bar, wherein the plurality of crossbars are configured to receive a plurality of tires in an upright position.