Hiland 27.5-inch Aluminum Electric Mountain Bike with 500W Mid Motor,48V 14AH Battery, Shimano 10 Speeds for Adult Black/Green/Gray 18" Grey - Walmart.com
Bafang 8fun 36v/48v/52v Ebike Motor Mid Drive Bbs01b Bbs02b Bbs03b Bbshd Motor Electric Bike Engine 250w 350w 500w 750w 1000w - Electric Bicycle Motor - AliExpress