I sell these fat tire cruisers (Dealer of Sikk) http://www.sikkinc.com/our-bikes/sikk-ufo
Looking at the one I have right here, put a jackshaft on and you're good to go.
-Zane
Errr.... Distance between the dropouts for the axels. I'm wondering because a Magic Pie electric 1000w motor would be nice on these; but they only work with 135mm rear or 100mm front.