After many months of searching, then another of getting the blasted thing installed correctly, Sam finally has a bike he can ride without tiring out. His bike is just a cheap Mongoose from WalMart. The electric conversion is made by Wilderness Energy. I was so glad to find someone made one for a 16" bike. It's very heavy, but it works. Took a bit of rigging and adjusting to get installed, but the smile on his face was well worth it.