265/35/R19 Rears and 235/35/R19 Fronts. They are BFG KDW's with the new tread pattern. I love them and no, they really aren't that much bigger than the stock circumfrence so no speedo problems here. I also thought they were big or odd when I first put them on but they have grown on me and the more I look at them on my Z, the happier I am that I got them. I got mine on e-bay for 600.00 (can't beat that for forged Ray's Racing wheels) and the tires cost me 400.00 through a guy I know.