Thanks for the advice. I will look into the Kevlar tubes. This might be a crazy idea, but has anybody ever used wheels meant for a lowrider bike? I've seen them as large as 26" but I imagine that they are rather heavy. From what I can tell they are just a single speed with a freewheel. I've even seen some that don't have excessive amounts of spokes. The one drawback that I can immediately think of is that they are probably wider than I will need since I don't plan on riding off pavement.