pic: A little surgery--ready for tread!
 

Re: pic: A little surgery--ready for tread!
 

You should vaccuum the dust out of those bearings. We did the same, then trued them on a lathe. If you don't have a lathe available, perhaps a stationary belt sander, or a sanding drum in a drill press, and use a bolt through the wheel bearings to hold them down on the table.

Re: pic: A little surgery--ready for tread!
 

I just re-found this picture, and I wanted to make one important note for anyone reading this down the line:

We screwed up (pun very much intended) on these wheels in one important area: we didn't use locknuts on the screws to hold on the sprockets. I remember us adding some Loctite to these nuts, but it apparently didn't hold. The result was us losing five of six screws on the center wheel sprocket, forcing us to miss our next match (which we lost by two).

Moral of the story? Locknuts, and check them each match.