Abstract: A boat trailer frame has front cross rails spanning the parallel portions of longitudinal rails with forwardly convergent front ends. The cross rails carry sets of boat hull-engaging members arranged to conform to the shape of the hulls of boats to be transported. Transversely extending pivots, in hanger cradles carried by longitudinally adjustable hangers depending from the longitudinal rails, mount the ends of the cross rails for pivoting movement in a fore and aft direction and pivot restricting stops interact between the hangers and cross rails to limit the arc of fore and aft pivot thereof.