I will look at discount ramps as well, but my trailer only has like 4 ft ramps and I don't have room in the trailer for longer ramps so I would have to put them in the truck. No biggie, but it would be nice to put in the trailer.
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My trailer is an old utility trailer with 2' high side rails. There is a space between the side rails and the aluminum wheel tracks. I just slide the ramps in there, one to a side, and fasten down to the side rail.