Perhaps our resident darkside expert, Bob109, would want to chime in on this as well but I also ran the Kumho tire and was happy with it. I'm glad you settled on lower air pressure though since less is required for the RF. After running the Kumho, I went with the Falken 612 and so far, I like it even better. The grip is truly awesome. Also, the Falken feels more like the stock tire due to a more rounded edge shape. It's not a RF so I am currently running around 37 psi and that seems to work quite well. And, for less than $100, this tire is a great buy.