To run a big tire car you’ll need a good set of Chassis Engineering Ladder Bar or Four-link Frame Rails. Our frame rails can be easily modified if needed to fit virtually any application. Chassis Engineering square tube rails are computer-controlled mandrel bent from 2” x 3” x .083 or .120.. Round tube rails are bent in the same manner as the square tube rails and are avaialbe in 1-3/4″  or can be ordered in 1-5/8″ upon request.