I have a 1 gallon Rotopax and I have it mounted on my rear fender rack. These things are SUPER tough!! Ive endo'ed my bike over right onto some rocks and it did nick it up a little, but they are very thick and substantial. Much more than just a regular gas can. Not super thrilled with the filler neck as mine has already broken the little internal spring after only a few uses. But, its not neccessary and I can still fill up the tank without it.