The Aostirmotor A20 packs rugged features, great comfort, and an affordable price. The A20 is equipped with a 36V 13Ah battery and a 500W brushless geared motor, ensuring long life and excellent performance. Comes with 4-inch fat tires. The places the Aostirmotor A20 can take you are almost limitless:downtown, rough roads, sandy beaches, snowy suburbs, and even the urban jungle. Customize your riding performance with 3 riding modes and Shimano 7-speed. Perfect double disc brakes and lighting system fully protect your safety. No wonder this is the first fat tire e-bike you should own.