GTRIDE’s Knight E1 is a perfect combination of fashion and Classic. Its unique exterior design and strong cycling power system will provide you with a thrilling cycling experience. Powerful fun for miles     – 750-watt hub motor delivers speeds up to 29.82 mph (48 km/h), and a rechargeable 48-volt battery system helps achieve up to 31.06 miles (50 km) of cruising; Reliable and steady            – 26*4.0 anti-puncture tires are air-filled and heavy duty, you are fearless of the rugged terrain; Smooth and stable            – The rear-wheel drive unit apportions greater weight to the rear, enhancing both drive traction and ease of steering; Ride where you want         – Recommended for riders ages 18 and up, with features like a bright LED headlight and brake-activated taillight; Sturdy and Durable            – With high quality steel construction, Warror E1 is a solid and durable electric ride that stands up to rugged use; Sitting and riding stylish – The Warror E1 equips sturdy and spacious seat, at the height of 26″ inch (66 cm) which make you sit comfortable and powerful when riding. More Specification Motor power 48V 750W Rear Hub Derailleur Shimano 7 Speed Derailleur Max speed 40km/h battery Samsung 50E-21 700-50000mh Max range 50km Brake Hydraulic Disc Brake Charge time 7-8hours Max climbing 7° Frame material 26inch Alu frame Display LCD display Tire Kenda 26*4.0 waterproof rate IP65