Tried a 908 front yet? Damn rubbery machine of death over 70mph when it's new but once the knobs have the sharp edges rounded off it's a pretty good street knobbie. I loved the Karoo on the front but it didn't last long at all. The sidewall was so stiff that when I changed it I got pissed off and wound up cutting the tire off, bead and all. I could not remove that tire with irons for the life of me.