Originally Posted by
lingua101
Have another incident that one of my wheel was totally ripped off when I took it off in ORD.
I can sort of see why the airlines are trying to limit liability for damage with the wheels. From their point of view you "choose"* to have a case that has wheels that stick out - and therefore much likely to be damaged during handling - you take the risk.
* Unfortunately for passengers, in the meantime the luggage companies have removed the choice as basically the old-fashioned two wheelers aren't available for purchase any more 
.