I wondered what the difference was between 1/2 ton and lets say 1 1/2 or 2 ton truck front fenders. I superimposed two photos and found this (see image). the back of the fenders is the sam but the larger truck (yellow) reaches way out beyond the 1/2 ton(red) . the blue line is my guess what would happen with a vertical chop to make 1/2 ton fenders out of larger ones. see the red and yellow wheel size and locations.