where can i buy bfg drag radials for my ss/sc? and what size should they be?

i know nothing about DRs and i'm not having much luck with the search function of the forum, so i apologize if this is a ridiculous question.

can someone please help me?

 

can buy them at pretty much any tire store. for size, try to match up the outer diameter of your current tires, usually ppl get smaller rims and run the appropriate size for that rim. search google for "tire size calculator"