1/2 of each outside dual hanging off the side of the trailer isn't bad you shoulda seen how well my 61 Chevy C60 fit on a buddys homeade trailer that i borrowed, the outside duals weren't really on at all.... and 1/4 to 1/2 of both front tires were off the edge.... had to make ramps out of wood so it would go over the fenders on the trailer (still wish i took pics of it on trailer, it was a sweet site to see, my 64 Chevy pulling this big 61 chevy)
Nate