Nevermind I looked it up...youre a strange guy lol.
Yeah, reusing the hubs. New wheels, hub and all, cost like $40 each... It already needs new tires and tubes all the way around and since I only paid $20 for the thing its hard for me to justify much investment.
And the purpose... Last resort... We have two large, very high energy dogs. Running them twice a day next to the bicycle, and additional playtime in the yard, has done little to calm them down. They're good dogs, listen to commands and all that, but we just simply can't exercise them enough. To be fair to them, we need a better outlet.... Or a better home.