FIIDO Fiido|D21 Folding With Torque Sensor Electric Bike - eBike Haul
FIIDO Fiido|D21 Folding With Torque Sensor Electric Bike - eBike Haul
FIIDO Fiido|D21 Folding With Torque Sensor Electric Bike - eBike Haul
FIIDO Fiido|D21 Folding With Torque Sensor Electric Bike - eBike Haul
FIIDO Fiido|D21 Folding With Torque Sensor Electric Bike - eBike Haul
FIIDO Fiido|D21 Folding With Torque Sensor Electric Bike - eBike Haul

Fiido|D21 Folding With Torque Sensor Electric Bike

Get 4% off On Order $500 & Up Use Code Fall2022 | Ends:
Regular price$1,199.00
Tax included. Shipping calculated at checkout.

  • In Stock, Processing time 3-10 Business Days
*Please Note: This item is only available for sale in the contiguous United States.
  • Free shipping within the United States.


Many fans told us that D11 needs torque sensor, so D21 is here

 Fiido|D21 Folding With Torque Sensor Electric Bike


Complementing this with a torque sensor to sense the force put into the pedals is a significant improvement, which can achieve low latency、accurate and maintenance-free.This improves the handling of the bike making it much more intuitive and enjoyable to ride, while also making it safer.



250W High-Efficiency Motor

The 35nm 250W brushless geared motor hidden in the 20-inch rear wheel provides tremendous power even in compact size and light weight, which is the reason why it can easily overcome rugged and steep roads with extremely low energy consumption.



Specially Designed Battery

The battery is concealed in seat tube, making it nearly tantamount to an ordinary bicycle at first glance, nevertheless, the range can still reach 100KM under the electric moped mode despite being so compact. Furthermore, the battery is removable meaning that you may get it powered anywhere at any time.



Praiseworthy Body Structure

The concise design with integrated seatpost that contains battery and taillight, reducing the quantity of components and improving efficiency to the full extent. In addition to the utilization of aerospace-grade aluminum alloy frame, the layout of the model conforms to the ergonomic design specifications, presenting comfortable riding experience with height-adjustable leather seat and the light self-weight of 12.9kg only.





The unique electric bicycle aesthetics that Fiido endows D21 truly achieves the perfect balance between form and function



MODEL Fiido D21
Voltage 36V 
Battery Cycle Times  800 times 
Moped mode range 80-100km
Max speed 25km/h
Working temperature -10~50°C
Frame material Aluminium alloy
Color Bronze
Max load 120kg
Net weight  17.5kg(with battery)
Tire size 20*1.75 inch
Ebike size 1480mm*570mm*1100mm
Folding size 800mm*400mm*740mm
Charging time 7 hours



You will get a full refund If you cancel your order after 24 hours. After that, you will be subject to cancellation fees depends on your method of payments.

2.6% for credit card users, 3.6% for PayPal users, 3.5% for Affirm users, 3.29% + $0.30 for Klarna users, 2.69% + $0.29 for Moolah users.

What's in the Box



Click Here


In addition to changing the color to a more metallic bronze color, the D21 has an upgraded torque sensor, which provides a better riding experience in the electric assist mode.

Good question! With the unique aerospace-grade aluminum alloy frame, the maximum load of D21 can reach 120kg.

Exactly. The battery is not that obvious for it is concealed in the seat tube.

11.6Ah. Thanks to FIIDO's patent, the battery capacity can reach 11.6Ah large in such a compact size.

Absolutely. Just take the seat tube down and get D21 powered anywhere.

In fact, the motor is hidden in the rear wheel by FIIDO’s peculiarly design.

The torque of the 250W brushless geared motor is 35nm, which means that you will ride effortlessly even climbing steep mountains.

With a net weight of 17.5kg, D21 is the lightest one among 20-inch e-bikes currently.

All you need is taking 3 simple steps to fold or unfold the e-bike, and you can also push it forwardafter folding to save effort.

Yes, the D21 is IP54 waterproof. But we recommend not to use it in heavy rain considered of safety. Please avoid putting the e-bike in water, or cleaning with a high-pressure water gun to avoid damage to electronic components and wiring due to soaking.

However, when passing through water pools, stagnant water, etc., pay attention to the height of wading not higher than the hub to prevent damage to the motor caused by water ingress. Do not wash with high-pressure water jets to avoid damage to electronic components and wiring due to wetness.

The activity of Li-ions decreases under low temperature, which may also influence the efficiency of the battery. However, the performance of the battery will return to its original state once the temperature rises.

Generally speaking, you can handle the replacement of the e-bike accessories if you are able to fix simple problems with a bicycle. Fiido shows a strict attitude towards the selection of components to ensure high quality of our products. Also, our after-sales department provides specialized technical video tutorial.

There are fender, charger, UK adapter, kickstand, open spanner and allen key inside the box.

Simply unfold it, and then install the pedals and seat tube. Actually, the entire frame of D21 has been assembled before leaving the factory.

Fiido offers one-year warranty, for more details: ______. If you have any questions about our products, please feel free to contact us at

Shipping, Warranty & Return

The Average Delivery Time Is Only 7 Business Days

Return Policy

Exchange and Returns

  • If you haven't received the shipping notification, you can cancel or modify this order by contacting our customer service by email. Our customer service will help you cancel or modify the order within 24 hours after receiving your email. Since the email is not an instant reply, we may find that your order has been sent when we process your email within 24 hours. In this case, we can only say sorry for that, and we can't help you cancel or modify the order anymore. So please check the order information carefully before placing the order.
  • If you have received the shipping notification, please note that we CANNOT cancel or modify orders anymore. Therefore, please wait for your package to arrive and you may either keep it or contact us to return for a refund. Please DO NOT refuse the delivery as the undelivered package will be destroyed by the third-party logistics.
  • You must first contact us and get our written approval before sending any item back. Any product returned without acceptance will not be refunded.
  • We will help you cancel the order and process to refund you, and the refund takes 1-2 business days back to your account.
  • Cut to size items and special orders may not be returned unless it has been determined to be provided in error by Our Company. If the returned goods affect the second sale, our company will be appropriate to depreciation fee and transportation fee.
  • Acceptance time for return and exchange:within 15 days upon arrival; We will offer full refund or exchange if the product has major defects and is damaged(Without packaging damage and deliberate damage), the freight does not need to be borne by the customer; The round-trip shipping cost will borne by customer for personal reasons like dislike( Not product quality issue);Our warranty policy will be in effect upon the receipt of goods.
  • Please note that all accessories do not support returns. Once the package is received for purchase, the item cannot be returned.If the damage is caused by transportation, the quality of the accessories is defective, and the accessories have not been delivered for more than 35 days, we will refund the full amount within 1-2 business days after confirmation, or compensate for the new accessories for a new round of transportation .


    1. For after-sales service, please contact


    2. For questions about orders on our website, please contact


    Please include following information:

    1. Platform of the purchase, such as, Amazon, Brand Store, etc. (If purchased on Amazon, Please also include the seller name on your order)
    1. Order number/ID/Date
    1. The email and shipping address you used when placed order
    1. Pictures/Short videos of the problems and a brief description of the problems

    Please contact us and get our written approval before sending any item back. Any product returned without acceptance will not be refunded. Refund will take 1-2 business days back to your account depending on what payment method you use.


    Warranty and Guarantee

    The warranty period for bicycle is as follows. If the customer finds non-human damage within the warranty period, we will send the replacement parts free of charge. 

    After warranty period, the customer has to pay replacement parts and shipping fees. The bike which we sell are factory new regular products, all parts are the same as the original parts.

    Warranty coverage

    One of the following conditions does NOT qualify for warranty:

    1. Failure caused by the user's failure to use, maintain and adjust according to the "Instruction Manual".

    2. Users disassemble, repair and modify themselves, and failures caused by non-compliance with the rules of use.

    3. Failure caused by improper use or storage by the user, or accident.

    4. No warranty card, or warranty card inconsistent with the bicycle.

    5. Vulnerable parts and consumables do not enjoy guarantees for repair, replacement or compensation of fault products, including brake seat bags, plastic parts, spokes, rims, brake cables, surface scratches, etc.

    6. The cost of repairing in other repair shops without the consent of the special maintenance organization.

    7. Slight scratches or damage to the outer shell caused by the logistics transportation of the accessories are not warranted.

    8. Scratched or broken lead fittings are not warranted.

      Contact US OR;

      Please include following information:

      1. Platform of the purchase, such as, Amazon, Brand Store (like eBikeHaul), etc.

      1. Order number/ID/Date

      1. The email and shipping address you used when placed order

      1. Pictures/Short videos of the problems and a brief description of the problems

      Please contact us and get our written approval before sending any item back. Any product returned without acceptance will not be refunded.

      About FIIDO
      • Who We Are

      Fiido spares no effort to research and develop reformatory electric bicycles and accessories for various groups of people. By means of technological promotion, Fiido has been dedicated to making exercise easier and settling mobility challenges since its establishment in December 2016.


        • History of FIIDO E-Bike

        The first FIIDO e-bike was born in 2017 and received widespread attention. Not only do we desire to provide cyclists with more effective commuting capabilities, but also a more enjoyable riding experience. 

        2019 has witnessed the birth of the highly anticipated D11. The D11 product ID was initialized in February that year. Our engineering team has confirmed final design form factor in April. Then they created product prototype in May. Three months later in August, product testing has been finished punctually. Finally in November our factory started mass production and quality assurance.

        We launched an Indiegogo campaign in June 2020 and successfully raised 1 million dollar. Batch shipment has started on August 1st in sequence and we’ve started batch delivery on September 1st.

          • Unique Design

          Every independent developed and produced electric bicycles retains the form and sport attributes of traditional bicycles under the premise of extremely lightweight. In consideration of the functionality of our products, most e-bikes are equipped with detachable hidden battery, which is a safer Lithium one. Furthermore, the configuration of assistor, brushless gear motor, efficient vector controller and 7-speed gear guarantees the stable performance of FIIDO e-bikes. As for portability, most e-bikes are foldable, making them easy to carry, which undoubtedly improves the convenience when going out for a long journey.

          We have four product series currently: Smart, Off-Road, Mileage, and Fun(?), which are in demand for more riding scenes. The market territory of our company covers more than 40 countries including USA, United Kingdom,Singapore, Italy, France, and the China.


            • Customer Always Comes First

            Through the distribution pattern of direct-to-consumer, Fiido creates a more cost-efficient way for customers to purchase by removing excessiveness from an out-of-date supply chain.

            We are definitely not the first brand to launch electric bicycles in the world, nevertheless, there’s one fact which made us proud - the electric bicycles we produced have consistently gained the greatest customers satisfaction. The implementation of this achievement should be attributed to the rigid selection of material, elaborate packaging during transportation and the peculiar design of our engineering team.

            It is precisely because Fiido takes all customers into consideration, you may find the e-bike that fits you most with ease whether you are a photographer, programmer, architect, officer, enterprise clerk, athlete, student, new mother or chauffeur.


              • Our Vision

              Fiido hammers at providing customers with an experience of riding electric bicycles that is brimming with gratification, merriment, and more importantly, our cyclists may get the accompanying health advantages when indulging in the joy of riding.

              We also pay close attention to the spiritual world of riders choosing our products. The cultural ascription of returning to the traditional bicycle shape and the satisfaction of cycling are irreplaceable regardless of how times change.

              To some extent, controlling time means controlling one’s own life. The electric bikes produced by Fiido may help when you were weighed down with life. In addition, with such multiple function and fashionable outlook, it may also be a thoughtful present for your loved ones.

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