A special Street Tire class is offered at the Packwood Pro-Solo for cars with street tires and which do not qualify for any of the Street Touring classes.

Supplemental Rule

STREET TIRE CLASSES. Two Street Tire classes will be provided: one Open and one Ladies. Class designation is an “I” or “IL.” The class is for cars using non-autocross DOT-approved tires. Purpose-built autocross or road racing ('R'-compound) tires are not allowed. See SIIR section 17.3 for tire eligibility specifics. The current National Pro-Solo Index values will be used to compute times for scoring. Street Touring classes are not eligible.”

How to register your Street Tire car

Follow three special steps when you register for the Pro-Solo:

• Select "AM - Solo" as the class for your car. You will NOT run with the A Modified cars.
• In the "Notes to registrar" box at the bottom of the registration form, specify the correct Pro-Solo Index class for your car.
• The classification designation is "I" for index or "IL" for index ladies. Use this in place of your normal classification.