I tore my KSOs a few months ago and Injeanious in SFO replaced them with no concerns. However, they were stolen with the rest of my stuff when I was in SFO last. Been almost a month without them and I am not happy. Got a pair of KSO Treks coming in next week, but I never tried them out, so I have no idea if they'll be awesome or the VFF equivalent of monster truck tires.