Super Shootout classing help

[it]

I've been putting off signing up for the shootout this weekend at Zmax b/c I'm stuck on my classing.

Looks like my car class is "BS" for my 2011 Evolution.

I'm having trouble finding reference to the tire classes, where can I find this at? I'm running Star Specs factory size right now, but would like to know where the reference is for this in the case I change my mind on tires in future.

[yellow CR]

You would be in Road Tire AWD at the Shootout.

To stay in stock class, you car run any size tire that you can fit on a stock sized rim.

[it]

Thanks, but that isn't one of the options on the form.
The options I have available are:
SS,HS,AS,BS,CS,DS,ES,FS,GS

[yellow CR]

Car Class: drop down menu select Road Tire AWD
Road Tire (RT) Class Index: drop down menu select BS

Road Tire Classes run off the PAX modifier, for you it is B-Stock

[it]

Thanks, that helps alot! I'll be signing up tonight when I get home from work, see you this weekend!