This is a two wheel drive bike done right (sort of) - BikeRadar
All Wheel Drive (2wd) Fat Bike Antarctica Expedition - Kate Leeming & Christini AWD - YouTube
2000w Enduro E Rocket 3 Wheel Flash Eco 2wd Electric Cargo Bike Ce En15194 Baby Kit Offroad - Buy Electric Bike,5000w Electric Bike,Electric Bike 72v 5000w Product on Alibaba.com
This all-wheel-drive fat bike is built to cross continents - CyclingTips
This is a two wheel drive bike done right (sort of) - BikeRadar
Letters: Oyama Two-Wheel Drive - Electric Bike Action