275/40/20 on all four corners of my 2010 srt8 challenger. I love the tires. People will always remark that they are no good in the rain. I look back in their eyes and say, " I have a minivan I drive in the rain. I have a 4 car garage. My toys never ever get wet. Then just smile. On my 67 fish I run 275/60/15 Mickey et street. With a 225/60/15 on the front. 27" tall. Rolled the front fender a little. The nittos are a great street tire. Last about 8000 miles, of course that depends on your right foot.