The Rubicon Electric Mountain Bicycle - 500 Watt, 48V - is a powerful bike with a compact lithium battery pack and lightweight aluminum frame. It has 9-speed gears, front and rear suspension, and high-quality brakes and grips. With a smart power assist system and LCD screen, this bike can go up to 70+ miles per charge. It is the fastest model sold and has been tested for 45 minutes climbing up a 5-7% grad