The full-suspension Storm G2 was designed and engineered around the unparalleled power and performance of Bafang’s ULTRA mid-drive motor. The Ultra motor is widely recognized as the diesel engine of fat tire electric bike mid-drive motors! For this reason, the rear suspension of the Storm G2 had to be just as heavy-duty, in order to handle all that torque and power without causing the frame to flex under intense loads. The Ultra motor is also referred to as a smart motor. The speed, cadence, shift, brake, and torque sensors provide continuous feedback from the rider to the motor. As a result, this allows the motor to deliver exactly what you ask. What you get is a very natural feeling ride, even while providing a tremendous amount of torque and power output. Featuring a Bafang M620 Ultra smart torque sensing G510 motor, capable of falling under all three classifications of electric bike laws. Toggle between 750 watts and 1,000 continuous watts with a max power output of 1,500 watts; extended distance 48v 25ah Li-Ion battery; 160NM of Torque/1500 Peak Wattage Output performance; Tektro HD E730 Quad Piston Hydraulic, 203mm front & rear brakes; RST Renegade Air Fork (120mm of travel) & Rockshox Monarch rear suspension; frame size: 19″ large for 5’10” and taller; removable left thumb throttle; 150mm 12mm Thru Axle Front Hub/Rear Hub 3/8x 26 tpi 190mm wheels; Sram 9sp, 40t front and Sram 11-34t rear cassette gears; 740mm locking, ergonimic handlebars for greater stability; side rear Derailleur Guards; SR Sport Saddle and aggressive skid-proof wide stance pedals. Includes extended distance 48V 25ah Li-Ion battery, rear pannier rack and 4 AMP smart charger. *Note- Bakcou recommend the 19″Frame for riders 5’10″”and taller. The 17″ frame is recommended for riders who are 5’7″-5’10”. If you are shorter than 5’7″, we recommend a step-through model bike.