sorry to spam the auto-x section but I'm prerpping my Z31 for it's 3rd appearance in the GRM challenge, and my tires are old and hard, I recently aquired a pair of 2A6's and I',m look ing for another pair, of just aobut anythign in a 15 or 16" diameter R compound, A6's are great but 71's are good to, just lookign for somethign no more than a year or 2 old with no cords showing and enough rubber to make it through 1 event, and free or at least cheap, remember this is a budget race, otherwide I'd just call tirerack
click the link in my sig to my Z31 for additional details or the car or the Challenge