Yesterday on the way in, I stupidly ran over a 1 inch branch. It was sucked up into my rear planet bike freddy and ripped the whole thing from my bike. The fender was zipp tied entirely to the bike with only two zipp ties (sufficient to hold it, but not to rip anything apart). I simply turned around, picked up my fender and remounted it with no problems when I got home. I can't help but think that the fender would have been pretty banged up had I mounted it with hardware.