Taken from:
http://www.hoosiertire.com/safetywarning/index.htmDIRECTION OF ROTATION/MOUNTING INSTRUCTIONS
ROTATIONAL GUIDELINES FOR TIRES WITH DIRECTIONAL ARROWS
All Hoosier tires having directional arrows must be mounted so that the tire travels in the direction of the arrow. Hoosier tires having directional arrows will have them on both sidewalls. Directional arrows may not be on a tire that can have both a left and/or right side application. All Hoosier tires not having directional arrows should be mounted as detailed below.
ROTATIONAL GUIDELINES FOR TIRES WITHOUT DIRECTIONAL ARROWS
Every Hoosier race tire has a four character serial code embossed into ONE sidewall of the tire. All Hoosier DOT tires will also have two additional codes as required by the Department of Transportation. (Example: J7AB 4AX8 3709)
CIRCLE TRACK RACING TIRES: (Includes both dirt and asphalt tires)
Hoosier tires must be mounted with the serial code located toward the infield.
Note that the code is put toward the infield, and not necessarily toward the car as stated in previous posts