I'd go with the chrome wheel package! One assumes that it pushes fine provided the wheels aren't too wobbly. Drive wheels w/o tread are certainly a pain if one is traversing sloped areas.

There's a couple of videos on youtube where the guy makes "tires" from old bicycle tires....cuts them to size and glues them on. One of them does what looks to be a good job; although it would be hard to imagine it lasting very long.

Not much to lose I guess.

Chuck

http://www.youtube.com/watch?v=COZBXl6edaQ