At € 369,95 and € 389,95 (weathered), both sets of three cars seemed reasonably priced. However, there was no mention of metal wheels in the product description. I also noticed some confusion about it on several internet forums, so I checked with LGB yesterday. They confirmed the hopper cars come with plastic wheels.
A bit of a strange move, certainly as LGB is delivering all their new rolling stock with metal wheels since 2013. Why make an exception for these hopper car sets only?