Product review (4 stars): Good and Bad: This is an exact replacement for the original part
This is identical to the original part which is good and bad.  Good because it fits exactly and works like the old one.  Bad because since it works like the old one, you will be replacing it again in about 6-8 months when the wheels fall off again.  I tried to use super glue to keep the axle/stem piece attached but eventually that fails too.  My next step is to use a nut/bolt combo I think to keep the wheels attached.
I hope you like the smell of burning plastic because with this cruddy design you will be smelling it quite often as the pieces fall off and land on the heating element.  I've searched for the web for a suitable replacement for this wheel set but unfortunately there doesn't seem to be one.  Nice design, Whirlpool!