The frame is constructed from 1"x3"x1/8" wall rectangular tubing. Tires are new last year, 950# rating, no dry rot or cracking. Deck is 3/4" pressure treated plywood, rails are pressure treated 2x4. Great handy trailer, pulls perfect! Holds 2 Quads sideways if the dirtbike tire supports are removed. Have 3 trailers now, that's the only reason for sale. $400 or trade for H1 wheels or 8k# + Winch.