27.5in E-Bike Electric Bicycle 250W Motor Mountain Bike Shimano 21 Speeds 25km/h

⚡ Powerful 250W Rear Hub Motor. ✔ 250W Brushless Rear Hub Motor. ???? Shimano 21-Speed Drivetrain. ✔ Professional Shimano 21-Speed Gear System. ???? Motor: 250W Rear Hub Motor. ???? 250W Brushless Motor. ✔ 90-110km Range in Pedal Assist Mode.