I'm running one on the back right now in the 190 55 series. I've pushed it pretty hard in the mountains with no problems, knee down action. It's the replacement for the 023's and I've been running them for years. I run super sport tires up front with the touring tire out back. Most people say I'm a very smooth rider, never stick it then pin it type. They are harder than the Roadsmarts but they work fine for my riding. Roadsmarts are the only rear tire that I've worn out the sides before the center.