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The AostirMotor A20 is a folding electric bike built around 20-inch by 4-inch fat tires and a 6061 aluminum frame. A 500W rear hub motor and a removable 36V 13Ah battery give it a 25 mph top speed and roughly 15 to 20 miles of range, and the frame folds to about 35 by 28 inches for car trunks and closets. It suits riders between 5'4" and 6'2" who want one bike for pavement, gravel and light trail use. Against rigid fat-tire e-bikes it trades some ride stability for portability, and against lighter folding e-bikes it trades weight and range for off-road grip and a 270 lb load rating.
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Owners describe it as a solid, fun fat-tire folder that handles mixed terrain, and the main reservations are weight and range.
The AostirMotor Fat Tire Folding Electric Bike A20 is a folding e-bike with 20 x 4.0 inch fat tires and a 500W motor. It has a 6061 aluminum alloy frame and a rigid aluminum alloy fork. The saddle and pedals fold, so the bike packs down for carrying and storage.
Power comes from a removable 36V 13Ah lithium battery. You can pedal with assist from the PAS pedal assist system or use the rotary throttle. Three riding modes are available: Pedal, Boost and Power. Mechanical disc brakes on the front and rear wheels handle stopping, and a 7-speed Shimano/Sunrace drivetrain handles gearing.
The bike has a front light, fenders, dedicated footrests and an LCD display. It has no front or rear suspension. A rear rack is not included and is available as an option.
