I just got the arched aluminum ramps about two weeks ago and already used them seven times to load and unload my 4 wheeler. They are awsome, very sturdy and don't bow but about 1/8 " you can't even tell really. Supper light and because they fold in half perfect storage under the quad. As soon as I got them I pulled them out of the box to inspect and the welds are perfect they are stong welds so i know i don't have to worry about the welds either. I highly recomend the Moose Arched Aluminum ramps worry free, light stong and you can load your quad or bike with out a problem. Muddy tire not a problem trust me I love mud riding, On these ramps the tires don't slip on my old ramps which I will not name brand I had to wash my tires because they would slipp.
I really like the style of these ramps. my only complaint with them is that the fit and finish seems a little on the low side the bars on the top side of the rams are not all the same length and not welded in the same spot. You can really tell that these were not made in the USA.