Make your bike electric with this swap-in tire | Engadget
Amazon.com: HILAND Electric Dirt Bike for Adults,26“x 4 Fat Tire Ebike with 500W&250W Motor & 48V 10.4Ah Battery,Lock Out Dual Suspension Fork and Shimano 7-Speed Beach Snow Mens Electric Mountain Bike :
GEO TRAIL - The Bike Place
Ecotric Seagull 26" Electric Mountain Bike | Journey eBikes | JourneyBikes.com