Fiido Folding E-Bikes: A Closer Look at the D11 and the X
“We write—we ride”: at Upway, this motto really comes into its own when it comes to folding e-bikes. In the sustainable mobility revolution, the folding e-bike has established itself as the ultimate hybrid solution. It combines the comfort and power of electric assistance with the practicality of a compact, foldable frame. In this segment, one brand has particularly caught my attention by making innovation accessible: Fiido. Today, I’ll take you on a tour of the two folding bikes in its lineup.
I’ve taken a close look at the Fiido D11 and the Fiido X, two models that perfectly embody the brand’s philosophy and have won over cyclists far beyond their country of origin. If you’re still trying to decide between the best folding e-bikes on the market, this comparison should help you make up your mind.
Key points
- Fiido has made the folding e-bike its flagship product, emphasizing compactness, modern design, and sophisticated technology.
- The Fiido D11 is designed primarily for light, practical, and efficient urban use on everyday commutes.
- The Fiido X offers a premium riding experience thanks, in part, to its magnesium frame, torque sensor, and advanced safety features.
Fiido: Innovation as the Driving Force Behind the Product Line
Fiido was founded with a clear mission: to create practical, technologically advanced, and—above all—affordable electric mobility solutions for everyone. While many traditional brands view electric folding bikes as a secondary niche product, compact and foldable models are at the very heart of Fiido’s identity.
The brand stands out by deliberately breaking away from the austere and purely functional image traditionally associated with folding bikes. Fiido proves that a folding bike can also be elegant, sporty, and aesthetically pleasing. I often come back to this point in my articles: the benefits of a folding e-bike are no longer limited to mere practicality.
Within Fiido’s extensive product line—which now also includes electric e MTB s and utility bikes—electric folding bikes take center stage. They are designed with a focus on space-saving and efficiency, without sacrificing performance. Premium features, such as batteries integrated into the seatpost and magnesium alloy frames, are offered at a fraction of the price of traditional competitors.
Fiido Folding E-Bikes
Two models perfectly embody this brand philosophy and have achieved true cult status around the world: the Fiido D11 and the high-end Fiido X.
Fiido D11: The Sleek Urban Companion
With the Fiido D11, the brand set a new standard at the time for what an affordable, minimalist electric folding bike should look like. Gone were the thick, unsightly frames and exposed batteries: the D11 introduced a sleek, futuristic design.
The Fiido D11 features a lightweight aluminum alloy frame, which keeps the bike’s weight—including the battery—to just about 17.5 kg. That’s remarkably light for a folding e-bike in this price range. Its most striking technical feature is its patented battery housed in the seat post: a fully concealed 36V 11.6Ah lithium-ion battery that gives the bike a sleek look and allows you to easily charge it indoors without having to bring the entire bike inside.
The bike features a compact 250-watt brushless motor in the rear wheel, which complies with European regulations on electric-assist bicycles. Paired with a 7-speed Shimano drivetrain, the D11 offers a sufficient range of gear ratios for urban use. Mechanical disc brakes on the front and rear provide stopping power, while the 20-inch wheels strike a good balance between compactness and stability.
On the road, the D11 offers a surprisingly lively and agile riding experience. Thanks to its 20-inch wheels, it turns with precision and responds immediately in heavy traffic. The pedal-assist system is controlled by a cadence sensor: as soon as you start pedaling, the motor kicks in to reach the selected speed. Acceleration is smooth and linear. Although it lacks active suspension, the 20- tires s still effectively absorb minor road imperfections, and on smooth bike paths, the D11 excels with its low rolling resistance, offering a realistic range of 60 to 80 km depending on the mode and conditions.
The Fiido D11 is designed primarily for urban commuters who combine their e-bike with public transportation. Thanks to its three-step folding mechanism, it folds quickly into a compact size that’s easy to slip onto a train, into a car trunk, or under a desk. It’s also an excellent companion for RV or boat owners looking for a lightweight, stylish transportation option to explore towns and cities without worrying about parking. You can find a comparable Fiido model refurbished , such as the Fiido D2S, at Upway.
Fiido X: High-End Innovation
While the D11 laid the groundwork for modern design, the Fiido X represents the culmination of that vision. Launched as a premium model, it introduces several innovations rarely seen in the world of folding bikes.
The first thing that stands out is its breathtaking design. The frame is cast from an ultralight and extremely durable magnesium alloy, with no visible welds, giving it an organic, almost futuristic look. All cables are also completely hidden inside the frame. The total weight is around 19.8 kg, slightly more than the D11, but this is more than offset by the onboard technology. The Fiido X features an upgraded version of the seatpost-mounted battery (36V 11.6Ah), supplemented by a wireless power transmission system: rather than a fragile cable that must be connected manually, the battery makes direct contact via conductive rails integrated into the frame tube.
Another technological feat: the keyless security system. The bike doesn’t start with a traditional key, but via a numeric code embedded under the taillight. In terms of mechanical components, the Fiido X steps up its game with hydraulic disc brakes for powerful and smooth braking in all weather conditions, as well as a 7-speed Shimano drivetrain. The motor is a 250-watt hub motor—efficient and quiet.
The biggest difference in performance between the D11 and the Fiido X lies in how the assist is delivered. The Fiido X is equipped with an advanced torque sensor rather than a cadence sensor. This sensor precisely measures the force the rider applies to the pedals and adjusts the assist accordingly, in real time. The result: an extremely natural, smooth, and intuitive ride, without the abrupt surge of power characteristic of more basic systems. The stiffness of the magnesium frame also provides more stable and solid handling at high speeds and in tight turns. The hydraulic brakes inspire confidence, and the Fiido X feels overall sportier and more dynamic than its predecessor. To compare this torque sensor with a more affordable model, I had previously detailed my review of the Fiido C11, where only the Pro version features it.
The Fiido X is designed for the discerning cyclist who doesn’t want to compromise on design, technology, or riding comfort. It’s the ideal electric folding bike for medium to long distances, both in the city and beyond. Thanks to its natural handling, it’s also well-suited for recreational rides on rough terrain or weekend getaways. Its advanced anti-theft protection and premium look also make it a coveted item among gadget enthusiasts and urban professionals looking for a bike with character. Those who prioritize light weight can also compare these weights with our selection of lightweight e-bikes, and the Fiido Pro models equipped with the same sensor can be viewed on the Fiido C11 Pro product page: refurbished.
Fiido D11 vs. Fiido X: A Comparison
| Features | Fiido D11 | Fiido X |
|---|---|---|
| Weight | ≈ 17.5 kg | ≈ 19.8 kg |
| Frame | Aluminum alloy | Seamless cast magnesium alloy |
| Battery | 36V 11.6Ah, integrated into the seatpost | 36V 11.6Ah, wireless power transmission via conductor rails |
| Assistance Sensor | Cadence sensor | Torque sensor |
| Brakes | Mechanical Discs | Hydraulic discs |
| Security | Standard anti-theft device | Keyless Digital Code |
| Ideal use | Daily urban commutes, multimodal transportation | Medium- to long-distance travel, heavy-duty use |
Conclusion: Which Fiido Should You Choose?
Fiido has revolutionized the traditional folding bike market by incorporating features that, until recently, seemed unthinkable in this price range. With the Fiido D11, the brand offers an excellent, lightweight entry-level model that excels in pure urban use and minimalist elegance: the ideal, no-frills companion for the daily commuter. The Fiido X, on the other hand, takes the concept a step further. With its futuristic magnesium frame, intuitive torque sensor, and keyless combination lock, it sets the standard for what a premium electric folding bike can be. Whether you prefer the functional simplicity of the D11 or the technological sophistication of the X, Fiido delivers compact and reliable mobility.
Dieter's Tip
If you decide to buy a Fiido refurbished, always check the battery’s actual condition before purchasing, especially on a model where it’s built into the seat post: that’s the most expensive part to replace. At Upway, this is part of the standard pre-sale inspection, which personally put my mind at ease during my test rides.
FAQ
What is the difference between the Fiido D11 and the Fiido X?
The D11 is lighter and designed primarily for practical urban use, while the X offers more technology, comfort, and a premium driving experience.
What sensor does the Fiido D11 use?
The D11 uses a cadence sensor, which activates the motor assist as soon as the pedals start turning.
Why is the Fiido X more technologically advanced?
In particular, the X features a torque sensor, a magnesium frame, hydraulic disc brakes, wireless power transmission, and a keyless combination lock.
Can you find a Fiido refurbished at Upway ?
Yes, Upway regularly refurbishes Fiido models, such as the D2S and the C11 Pro, and offers a one-year warranty and a thorough inspection before sale.
What kind of range can you expect from a Fiido folding bike?
Depending on the model and the selected assist mode, you can generally expect a range of between 60 and 80 km under typical urban driving conditions.
Written by: Dieter Devriendt | Published on: August 21, 2026 | 9-minute read
About the Author: Dieter Devriendt
A passionate journalist, Dieter writes about cycling with expertise and enthusiasm. Under the motto “we write—we ride,” he gladly shares his experience to help cyclists get the most out of their lives both on and off the bike.