Product review (5 stars): Best $20 I Ever Spent!
I can honestly say this is probably the best $20 I have ever spent.  My GE Monogram Dishwasher had the original wheels which were constantly falling off.  The original wheels (horrible design) only had a small tab to hold the wheels in place.  They easily popped loose and ended up in the bottom of the machine...sometimes melted by the heating element.  These wheels have a newly designed stud that clicks into place securely and will not come off.  Also, the wheels are larger and thicker and roll much better.  If you buy these from an appliance store they will be 3 times more expensive.  After 4 years of dragging a wheel-less dish rack out, I wish I had found these sooner.