?New Upgrade I-PAS System with powerful motor?Intelligent power assist system (I-PAS) is patented technology of Rattan Team. I-PAS motor after being optimized, can easily make the efficiency more than 83%, under intelligent controlling , can be realized the seamless switching between drive and generate. Comparing to the traditional control system it saves more than 50% of electric power.What's more. the maximum speed can easily achieve to 28MPH. ?Brake & Gear Shift System?- Our E-bikes equipped front and rear mechanical disc brakes. Disc brakes are more reliable and more braking power in different weathers. With 7-Speed classic transmission system and the powerful I-PAS 750W motor, which much increases hill-climbing power, further range variation, and greater terrain adaptability. ?Faster Speed & Father Mileage?- The newest technology is used in the stable 750w motor. It helps the ebike for more than 50% energy saving. But at the same time, the speed power was not reduced. Matching the removable 48V 13ah upgraded Lithium-Ion Battery can get 40-50 miles (E-bike Mode) to 70-80 miles (Assisted Mode) ridding under ideal condition. ?26 Inch Fat Tire & Details Design?- This electric bike use 100% Aluminum Alloy frame and the Aluminum shoulder fork, which is light, strong and designed to last. You can get more fun with 26inch off-road fat tire. It has puncture-proff tire, which are stable and make sure you can enjoy the excellent riding trips. This electric bike comes with (E-bike & Assisted bicycle & Bicycle)3 cycling modes, adapt to different weathers or roads. ?After-sale Service & Assembly Warranty?- With 1 year warranty for the electric motor, battery and the charger, You've no worry using it. We have confidence in our electric bike, and believe you would like it. If you have any questions about our electric bike in any time. Please contact us on Amazon.