This electric bike was purchased March 13th. Please do not purchase for your kid or teenager. This is and should be an adult bike. This Bike is new, good for a peace of mind, riding around your neighborhood and bike trailing. I have been testing it for a Vendor and it rides great. The fat tires on it make it great for dirt trails and makes uneven roads more comfortable. You can petal it as a regular bike on 5 different modes or push down the throttle to go full electric. Below are the specs. Main specification Motor Type permanent magnet brushless DC motor Rated power 1200W Rated RPM 235r/min Rated voltage 48V Weight 62 lbs Max load 198lbs Max Speed (US stock): 40mph Distance per once charge 37 Miles Climbing ≤12 ° Overcurrent protection value 15± 1A undervoltage protection value 31.5±0.5V Battery type Lithium polymer Battery voltage 48V Battery capacity 17.5Ah Charger Input voltage AC110-220V50HZ Charging time 6~8h Tire Size 26 inch