Fiido D11 Folding Electric Bike Review
Our honest Fiido D11 review: a light 20in folding e-bike with a seatpost battery, ideal for UK commuters. Specs, real-world range, pros, cons and verdict.
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Our verdict
A genuinely light, smart-looking folding e-bike that suits flat city commutes and train-and-ride travel, as long as you accept a single gear, a cadence sensor and limited fit for taller riders.
The Fiido D11 is the bike that put Fiido on the map in the UK. It is easy to see why. The awkward part of owning a folding electric bike is the weight. The D11 quietly solves that problem. It weighs around 19.5kg. That is noticeably lighter than most folders. A clever battery hides inside the seatpost instead of bolting onto the frame. That low weight changes how often you actually use the bike if you mix cycling with the train. The question is whether you can live with the compromises that come with that lightness. The main ones are a single gear and a cadence sensor.
Who the Fiido D11 is for
This is a commuter’s folding bike, not a do-everything e-bike. The D11 is close to ideal for a week of a flat-to-rolling ride to the station, a folded bike on the train, and a short hop at the other end. The 20-inch aluminium frame folds in around five seconds on a single main hinge. The removable seatpost battery means you can charge indoors without dragging the whole bike inside. The understated frame looks more like a smart town bike than a gadget.
It is less suited to hilly routes or taller riders. There is only one gear. You are pedalling a single ratio with no help on steeper climbs or when you push past the 15.5mph assist cut-off. The handlebar height is not adjustable either. Riders much over six foot tend to find the fit cramped on longer rides. A geared folder will suit you better if either of those describes you.
Motor, battery and range
The D11 uses a 250W rear hub motor with around 35Nm of torque. That keeps it firmly within UK EAPC rules: assistance cuts out at 15.5mph and there is no licence, tax or insurance to think about. The push is smooth and quiet on the flat. It is plenty to carry you and a bag at a relaxed commuting pace. It relies on a cadence sensor. That sensor reads whether you are pedalling rather than how hard. The assistance feels a touch less natural as a result than the torque-sensor systems on pricier bikes. In a flat city it rarely matters. On a steep start from a standstill it does.
The headline feature is the battery. The 36V 11.6Ah pack is roughly 417Wh. It slides into the seatpost and lifts out for charging or security. That keeps the front end light and nimble. Range is where expectations need managing. Fiido quotes up to around 62 miles. That is a flat-ground, lowest-assist best case. Independent testing lands closer to 30 to 47 miles in normal use. Hills, higher assist, cold weather and heavier riders all pull you toward the bottom of that. Plan for around 30 miles of dependable range and you will not be caught out. Our electric bike range guide explains how to squeeze more miles from any battery.
Living with it
The everyday joy of the D11 is how little it asks of you. It is light enough to carry up a flight of stairs without dreading it. The fold is quick and secure. The IP54 rating means light UK rain and puddles are not a worry. The minimalist single-speed drivetrain has fewer parts to maintain than a derailleur setup. That suits riders who want to ride rather than tinker.
The compromises are the ones you would expect at the weight and price. The single gear limits you on hills. The cadence sensor is functional rather than refined. The saddle and grips are merely adequate out of the box. Fiido sells largely direct and through online retailers. You do not get the high-street build-and-service safety net of a shop-bought bike as a result. Factor in a nearby bike shop for servicing. None of these are deal-breakers for a flat-city commuter. They are the reasons to spend more if your route is hilly or your frame is tall.
How it compares
Look at wider folding electric bike options if the single gear worries you. Geared rivals trade some weight for more climbing ability.
Our best folding electric bikes roundup covers those geared alternatives in full. It also places the D11 against Fiido’s wider line-up of fat-tyre and cargo models.
Check the latest Fiido D11 priceVerdict
The Fiido D11 is a smart, genuinely light folding e-bike that nails the one thing most folders get wrong: it is easy to carry. It is one of the easier folding recommendations around £800 for a flat or gently rolling city commute combined with train travel. The seatpost battery is a clever, practical touch. It is not the bike for hilly routes, taller riders or anyone wanting the polish of a torque-sensor mid-drive. Match it to flat urban miles. It earns its keep every day.
Frequently asked questions
Is the Fiido D11 any good?
Yes, for flat urban commuting it is a strong choice. It is light for a folding e-bike, looks smart, and the seatpost battery keeps the front end nimble. The main compromises are a single gear, a cadence sensor rather than a torque sensor, and a non-adjustable handlebar height that suits riders under about six foot best.
What is the real range of the Fiido D11?
Fiido claims up to around 62 miles, but that is a best case in the lowest assist on flat ground. Independent reviewers have measured roughly 30 to 47 miles in normal riding. Hills, higher assist, heavier riders and cold weather all push you toward the lower end, so plan for around 30 miles to be safe.
Is the Fiido D11 road legal in the UK?
Yes. It is an EAPC with a 250W motor and assistance that cuts out at 15.5mph, so it is treated as a normal bicycle. You do not need a licence, road tax or insurance, and you can ride it anywhere a pedal bike is allowed, provided the rider is at least 14.
How heavy is the Fiido D11 and does it fold small?
It weighs around 19.5kg, which is light for a folding e-bike, and it folds in roughly five seconds via a single main hinge. It is manageable to lift onto a train or carry up a short flight of stairs, though it is still heavier than a non-electric Brompton-style folder.
Does the Fiido D11 have gears?
No, it is single-speed. The motor assistance compensates on gentle gradients, but on steeper UK hills, or if you ride above the 15.5mph cut-off, the lack of gears is noticeable. It is built for flat-to-rolling city routes rather than hilly terrain.