Aostirmotor A20 500W Fat Tire Folding Ebike w/ Twist Throttle

2 reviews

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500W Rear Hub Brushless Motor

36V/13Ah Seat-Tube Mounted Removable Battery

5-Level Pedal Assist System (PAS) w/ Speed Sensor + Right side Twist Throttle & 7-Speed Gears

Front and Rear Mechanical Disk Brakes


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Aostirmotor A20 Description

Wow, the A20 Fat Tire Folding Electric Bike is such an amazing ebike for the price. You get a portable off-road riding monster with a high-torque 500W rear hub motor, a 5-level pedal assist system (PAS) and a twist throttle.

If you travel in an RV, the A20 is perfect for trips to town, and trips to the outback. And if you just want a fat tire bike that's easy and fun to ride, the A20 is your ticket. 

A20 Specifications

  • Motor: Truckrun Brand 500W Rear Hub Brushless Motor
  • Battery: 36V/13Ah Lithium-Ion Seat-Tube Mounted Removable Battery
  • Controller: 36V/22Ah Controller
  • Charger: 110V - 220V Charger
  • Display: Aostirmotor866-LCD Display
  • Drive Mode: 5-Level Pedal Assist System (w/ Speed Sensor), Right Side Half-Twist Throttle & 7-Speed Shimano Sunrace Derailleur
  • Charge Time: 4-6 Hours
  • Brake: Tektro Mechanical Disc Brakes w/ 180mm Front & 160mm Rear Rotors
  • Max Speed: 15 mph.
  • Fork: Aluminum Alloy Rigid Fork
  • Frame: 6061 Lightweight Aluminum Alloy Folding Frame
  • Handlebar Dimension: 31.8mm x 660mm
  • Stem: 28.6mm x 31.8mm x 110mm
  • Tire: 20” x 4” Chaoyang Fat Tires Mounted on Aluminum Alloy Spoked Wheels
  • Saddle: Folding Saddle
  • Lights: LED Front Headlight and Rear Reflector
  • Pedals: Folding Pedals
  • Fenders: Black Plastic Fenders
  • Weight: 64 Lbs.
  • Bike Dimensions: (L x H) 69.2” x 48”
  • Folded Dimensions: 35” x 27.5”
  • Box Dimensions & Weight: 55” x 11” x 26.7” (75 Lbs.)
  • Wheelbase: 45”
  • Wheel Diameter: 22”
  • Minimum Seat Height: 31.4”
  • Maximum Seat Height: 36.2”
  • Standover Height: 25”
  • Handlebar Length: 25”
  • Max Weight Capacity: 260 Lbs.
  • Rear Rack: Optional
  • Assembly: The A20 comes mostly assembled. Final assembly includes attachment of the pedals, handlebar, front wheel, seat, fender and light. Please see the assembly video below.
  • Tools Required: 4mm, 5mm and 6mm hex (Allen) keys, and 8mm/10mm and 13mm/15mm wrenches (Included)
  • Shipping: Free shipping to the lower 48. For shipping to Canada, please send us your shipping address and the products you want, and we will find the best rate available. We cannot ship this brand to Alaska or Hawaii at this time.

Aostirmotor A20 Assembly Instructions

This video provides step-by-step instructions to assist with the unboxing and assembly of your new Aostirmotor A20 500W ebike.

Orders for in-stock items take 24-48 hours to process, then about 5-7 days in transit. Delays due to Covid have occurred. If an item is on backorder, the estimated ship date will be shown below the Pre-Order Button.

All products are shipped free within the Contiguous US via UPS, FedEx or similar carrier. Shipping to AK, HI and PR may incur additional charges.

If your package appears damaged from shipping, please do not accept it. Tell the driver to keep the package and contact us immediately at 888-883-3350. We offerGuide Package Protectionto ensure against lost, stolen or damaged goods. Click here to learn more about Guide.

Returns for buyer’s remorse are typically not accepted by our suppliers, and if accepted, the customer may incur shipping and restocking fees.

Please click here to read our entire Shipping & Returns Policy.


Ask a Question
  • I just assembled my a20 charged the battery and when I powered up the lcd pad it blinked and went out and wouldn't go on again until I pulled the battery up and then back down again to connect pushed the power button again and it did the same thing and I have tried numerous times and get the same results. Help thanks

    I would recommend contacting your dealer. This could be a problem with the controller, which would be covered under warranty.

  • Do you have any showroom in vancouver??

    We serve the US market and do not have a showroom in Vancouver. Please check with the manufacturer to see if they have dealers in Canada.

Customer Reviews
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    Absolutely Perfect Entry Level E-Bike

    I've had my A20 for a week now and already put 100 miles on it! It has real power that is felt immediately and the range is great too, I get about 20 miles on a full charge using assist level 3, mostly. The cruising speed at level 3 is around 15 mph and about 22 mph at the level 5. It is really well built and feels totally stable .The price point is really great for a first time foray into e-biking, as most well made regular adult bikes start at around $600+

    A Really Good Ebikes Customer
    Joe H.
    United States United States

    Really Good Ebikes

    Glad to hear you love your bike. Thank you for the awesome review.


    Fun Ebike

    This is a great product at a great price. This is my first ebike and I love it. Super fun!

    Frank D.
    Dominica Dominica

    Really Good Ebikes

    Thank you for the review.