walt rapp posted:I've always wondered: do they serve any real purpose other than "looks"? Would it matter, for instance, if they were not replaced when the side frame(s) was removed?
- walt
Yes, on most trucks they do theoretically provide equalization for the truck, and they do need to be there to locate the side frames. In almost all cases, however, they are so stiff as to be effectively decorative.
Some passenger cars have springs and truck designs that are close to realistic, in terms of spring rate.
