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.

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.
MOUNTING GUIDELINES FOR TIRES WITHOUT DIRECTIONAL ARROWS
CIRCLE TRACK RACING TIRES:
(Includes both dirt and asphalt tires)
Hoosier tires must be mounted with the serial code located toward the infield.
ROAD RACING TIRES:
(Includes catalog numbers beginning with 43, 44, 45, 46)
In most cases, Hoosier tires used in Road Race applications should be mounted with the serial code toward the center of the vehicle. Once a tire has been run in the proper orientation it is acceptable to remount the tire in the opposite direction to even out the wear.
DRAG RACING TIRES, INCLUDING DOT DRAG TIRES:
(Includes catalog numbers beginning with 17, 18)
Hoosier drag tires can be mounted to rotate in either direction. Hoosier drag tires can also be flipped or reversed to provide even wear.
Verify Correct Wheel and Bead Flange: All tires are designed to be used on wheels that are manufactured to Tire and Rim Association (T&RA) specifications and tolerances. Some rims are non-standard or damaged and it is necessary to inspect the rim flange to assure proper fit. Consult your specific rim manufacturer to determine if your rim can be used in this application. Never attempt to install and inflate a tire of one bead diameter on a rim or wheel of a different bead diameter. Use of Hoosier Racing Tires on wheels with incorrect bead flanges or wheels that do not meet T&RA standards can cause the assembly to fail and burst with explosive force sufficient to cause serious personal injury or death.
Special Tire Mounting Instructions: Tire changing should be done only by trained personnel using proper tools and procedures. Failure to follow safe mounting procedures could cause faulty positioning of the tire and cause the assembly to burst with explosive force sufficient to cause serious injury or death. Always inspect tire for kinked beads or other possible damage that may have occurred in shipping or storage. Clean rim and lubricate beads with rubber lubricant. Always lock rim on mounting machine or place in safety cage. Use a clip on chuck, an inline valve with a pressure gauge or adjustable regulator and remote inflation/deflation device. Have enough air hose to stay out of the trajectory. Stand Back.
When seating beads never exceed maximum bead seating pressure as molded in tire sidewall. Never exceed manufacturer’s maximum inflation pressure.