Pre-assembled; the electric bike already comes pre-assembled so you won't have to waste time with complicated assembly and foreign bike parts Height adjustable for adults and teens; easily adjust the bicycle seat and handlebar to find the perfect position for a comfortable ride 14 inch wheels; a pair of air-filled rubber tires with quick-disconnect power lines ensure better traction and easy tire maintenance. Terrain Type-Flat Terrain 15.5 mile range; ride your hybrid bike on full throttle to cruise up to 15.5 miles on a single charge by toggling between power assist and pedaling The EB-5’s foldable bike frame can accommodate riders up to 264 pounds and folds three times so it fits inside compact vehicles, under desks, on subways and in other small spaces. Charging Time - 4-5 hrs