Bachmann Metal Wheelsets

[vsmith]

Those small ones were ment for the ore cars Bmann sells, see if you can return them and get the large wheel set, they are a direct swap out with the plastic wheels.

[barclaysierra]

I ordered some of the small dia Bachmann wheelsets and they are too small for my LGB and USA cars with plastic wheels.
Anyone know what they are used for?
I apparently need the larger size for all of my rolling stock...not extensive yet....as they all appear to be the larger size.
Thanks!