I guess I don't understand what an xtracycle is. Since it is in the touring section, that is what I thought he was building. He is light enough that even carrying a child he would be lighter than I am. I have a pair of 26" wheels with Rhyno Lite rims, 48 spoke, Phil Wood hubs. Talk about overkill! They are on what for me passes as a mountain bike.
The nice thing is, you can disregard all this so-called educated opinion and do what you want.