I had them on my SS..actually had been using them way back in the 90's for MTB. I originally purchased my current set for my now sold MTB and decided to give them a whirl on my SS.. Maybe I needed to install them on a better set of pedals.. but, they held my foot in such a position that the sides of the soles of my shoes (Converse CT lows) would rub against the crank arms with each pedal rev. I have since scored an old school rigid MTB that they will be put to better use on. Power Grips are a great product.. but for a fixed gear bike????