[thefro526]

Originally Posted by tim-tim

One hub is enough, but I recommend placing a bearing on the other side of the wheel; as opposed to leaving it "empty".

I've done this before and it works just fine.

An alternative is to use this guy: http://www.andymark.com/product-p/am-1305.htm which makes wheel swaps a tad bit easier since the hex doesn't move.