If the Elio used the rear wheel as a drive wheel, it would be a problem; but being that the rear wheel is just something to hold up the back of it, going through loose gravel shouldn't be a problem.Most gravel roads have 3 wheel tracks and you generally drive on the right hand two. There are two "windrows" of gravel that separate the wheel tracks. I think that dodging potholes will be an issue but the real problem on gravel will be that rear tire riding in what can often be 2 or 3 inches of loose gravel. I have a mile of gravel to drive on before I get to a hard surface road. I have already decided that I will have to drive that a little slower than I usually do but that is a good intention. The same things that the road to hell is paved with.