"(I know, I know... 30 series tires + Z32 = no traction anyway)" I respectfully disagree. I am now running the Toyo R888 in 285/30/18 and am QUITE IMPRESSED with their street traction. I bought 8 from an SCCA TT guy and had some in classifieds for awhile (all sold now). I run them at all 4 corners now. Traction is good - real good.