hardcore e-cycles. dual hub motor design or u can get it with a mid drive/front hub. if you can stay on the bike, they’ll climb it. i have a “trailer” for it and have pulled 300lbs of corn on it without a single thought of i needed more power. and the owner is hands on and even sent me his cell # if i have any questions or concerns abt anything. they’re out of ohio. i got the 20” tire that looks like a kids bike bc im a midget but they also make one with 27/28” tires. zero issues yet and it 2.5 years old. holds a charge for forever and i haven’t pedaled once, just twist the throttle.