I have a 2002 Infiniti Q45 Sport w/262,000 miles. I ran Kuhmos asx 255/45/18 for 4 sets (40-45k a set). I changed to the spt because I wanted the tallest tire that would fit and the 245/50/18 was not available in the asx. I am very please w/ the spt. I drive in sACRAMENTO ca AND TO TEXAS 2-3 times a yr. I am as pleased w/ this tire as I was with the asx. I run 43psi nitro. The wear is not abnormal and the ride quality is still good. I highly recommend the Kohmo brand. I have had Kuhmos on the Q45 since 60k miles and they are a great great at a great price.