DYU D3F Folding Electric Bike
SKU: M47755In Stock
SPEED15.5 Mph
RANGE25 Miles
MOTOR250W
BATTERY10Ah
CHARGING5 Hours
WEIGHT42 lbs
Adjustable Cycle Helmet£38.99
Front and Rear Light Set£44.99
This Model Is Fully Compliant With UK Road Regulations
This bike is built to comply with UK Electrically Assisted Pedal Cycle (EAPC) regulations, meaning it can be used on public roads and cycle paths without registration, tax, or a licence. Motor assistance is limited to 250W and cuts off at 15.5 mph (25 km/h).
See UK LegislationThis one carries 360 Wh of battery. The maker quotes 25 mi; in mixed riding with some hills, expect nearer 19 mi. A full charge costs about £0.10. Across a year that is roughly £981.00 less than making the same journeys by car, so the bike pays for itself in about 5 months. Everything here is worked out from this bike's own specification. Estimates, not promises: the assumptions are printed underneath.
Range you can expect
| Low assist, flat roads | 25 mi |
|---|---|
| Mixed riding, some hills | 19 mi |
| Full assist, loaded or hilly | 14 mi |
| Riding time on a charge | 1 h 37 min |
What it costs to run
| A full charge | £0.10 |
|---|---|
| Every 100 miles | £0.40 |
| Electricity for a year | £9.00 |
| The same year by car | £990.00 |
| You keep | £981.00 |
| Pays for itself in | 5 months |
Worked out from the specification
| Battery energy | 360 Wh |
|---|---|
| Energy per mile | 14.4 Wh |
| Charger output | 2.0 A |
| Power to weight | 13.1 W/kg |
| You can carry | 265 lb |
Based on £0.245 per kWh, £0.45 per mile to run a small car, and 2,200 miles a year. Charging is costed at the socket, not at the battery.
The smallest, lightest and cheapest bike we sell
The DYU D3F weighs forty-two pounds and costs less than anything else on our shelf. Fourteen-inch wheels put it closer to a folding scooter with pedals than to a bicycle, and that is exactly why people buy it.
It is road legal at 250W, so there is no licence, no tax and no insurance to arrange.
The cheapest way to find out if this suits you
An electric bike is a large purchase to make on a guess. This one is small enough in price that you can discover whether it fits your week before committing four figures to a bigger machine.
Plenty of people buy this, learn what they actually need, and keep it as the second bike.
One person can lift it, which nothing else here manages
Forty-two pounds is light enough to carry up a step, put in a boot, or lift onto a rack without help and without planning.
Every other bike on this page is a two-handed job at best. This is the specification that decides whether a folding bike actually gets folded.
It folds into a slab
Folded it is about twenty centimetres across: thin enough to slide behind a car seat, stand in a cupboard, or go in the boot of a small car alongside the shopping rather than instead of it.
Most folding bikes fold into a lump. This one folds into something you can post into a gap.
Small wheels: nimble in town, twitchy at speed
Fourteen-inch wheels turn quickly and store small, and they are darty compared with a full-size bike. Weaving through traffic to a station they are an advantage.
On an open road at speed they ask for more attention. That trade is the bike in one sentence.
Disc brakes at both ends
Front and rear discs on a bike at this price is not a given, and they hold their stopping power when the wheels are wet.
On small wheels, where there is less rim to grab and less time to stop, that matters more than it would on a full-size bike.
Lit at both ends, including a fog light
A headlight and a rear fog light are fitted from new. A fog light on a bicycle is unusual, and on a dark wet British evening it is the light that makes you visible before your shape is.
There is also cruise control for a long flat stretch, which is rare at any price.
Sealed, and rated for a cold morning
The electronics carry an IP54 rating and the bike is specified to operate from minus ten degrees. That is a January commute in most of the country.
Cold cuts the range on any battery, so expect less in winter than the number suggests, but the bike itself is built to be out in it.
What to do before the first ride
It arrives almost complete.
- Unfold the frame and lock the hinge
- Raise the seat post and handlebar and tighten both clamps
- Check both brakes and the tyre pressure
- Charge it fully before the first ride
Not for hills, distance or a heavy rider
Small wheels and a small battery mean short journeys. On a long ride or a steep hill you will run out of range and patience together, and the bands in the table below are the honest version of the claim.
Fourteen-inch wheels also drop into potholes a larger wheel rides over, so a badly surfaced road is genuinely unpleasant. The rated payload is the lowest on our shelf: check it in the table against your own weight before you order. Buy this for short urban trips and it is excellent. Buy it for a ten-mile commute and you will regret it by the second week.
- BRAND
- DYU
- CATEGORY
- Folding
- MOTOR POWER
- 250W
- RANGE
- 25 Miles
- SPEED
- 15.5 Mph
- BATTERY
- 10Ah
- WEIGHT
- 42 lbs
- CHARGING TIME
- 5 Hours
- BRAKE SYSTEM
- Front and rear disc brakes
- FRAME MATERIAL
- Metal
- MAXIMUM LOAD
- 265 lbs
- INPUT VOLTAGE
- 36V
- TIRE SIZE
- 14 inch
- TORQUE
- N/A
The DYU D3F Folding Electric Bike states 250W, 25 Miles and 15.5 Mph, and below it is set against the DYU A1F Electric Folding Bike. Every figure the two disagree on is marked. Choose a different bike to compare it with whichever one you are also considering.
3 of 11 specifications differ. View DYU A1F Electric Folding Bike
- What motor does the DYU D3F use?
- The DYU D3F uses a 250W motor with up to 500W peak power.
- What battery does the DYU D3F have?
- It comes with a 36V 10Ah lithium-ion battery.
- What is the range of the DYU D3F?
- DYU lists up to 31 miles in pedal-assist mode and up to 25 miles using the throttle. Actual range varies according to riding conditions.
- How fast can the DYU D3F travel?
- The current specification lists a maximum assisted speed of 15.5 mph.
- Are the electric bikes brand new?
- Yes. All electric bikes sold by BikTron are brand new, factory-sealed, and sourced directly from authorised manufacturers and official distributors.
- How do I choose the right electric bike for me?
- Pick a bike based on how you plan to ride. City bikes are great for commuting, folding bikes work well if you need compact storage, mountain bikes handle hills and mixed terrain, and cargo bikes are ideal for carrying shopping or loads. If you are not sure, our Bike Quiz can help.
- Are the batteries original and certified?
- Yes. Every electric bike battery is brand new and original from the manufacturer, with full safety certification and performance testing.
- Are the bikes tested before shipping?
- Yes. Each e-bike goes through a quality check before dispatch, covering electronics, brakes, motor response, and battery performance.
- Do electric bikes come with a warranty?
- Yes. All electric bikes from BikTron include a manufacturer warranty. Duration depends on the brand and model. Most bikes include a 12-month warranty as standard.
- How long does delivery take?
- Standard UK delivery usually takes 2 to 7 business days. Remote areas may take a little longer. You will receive a tracking link by email once your order is dispatched.
- Which payment methods do you accept?
- We accept Visa, Mastercard, PayPal, Apple Pay, Google Pay, and Klarna buy-now-pay-later. All payments are processed securely.
- Can I return my electric bike?
- Yes. You can ride the bike and still return it. Tell us within 30 days of delivery and we book the courier and collect it from your door. Contact us first and we will guide you through the process.
- Do the bikes need assembly?
- Most electric bikes arrive 85 to 90 per cent pre-assembled. You will usually need to attach the handlebars, pedals, and adjust the seat. A basic tool set is often included.
- Are BikTron electric bikes legal to ride in the UK?
- Yes. All bikes sold by BikTron that meet UK EAPC rules (250W motor, max 15.5 mph assisted speed, pedal-assisted only) are fully road-legal. You do not need a licence, tax, or insurance to ride them on public roads. Riders must be at least 14 years old.
- What about the electric scooters?
- Those are different, and the law treats them differently. A privately owned e-scooter cannot legally be ridden on a public road, pavement or cycle lane in the UK, whoever sold it. We sell ours for private land use only, with the landowner's permission, and every scooter product page says so. If you want something you can ride to work, choose an electric bike.
Secure checkout and fast UK delivery on every order.
- Free standard UK delivery on most bikes — 2 to 7 business days
- Express delivery may be available on request
- Full tracking included with every order
- Pay securely with Visa, Mastercard, PayPal, Apple Pay, Google Pay, or Klarna
- 0% finance available through Klarna at checkout
Before you order:
- Delivery is to UK mainland addresses — some remote areas may have a small surcharge
- Most bikes arrive 85–90% pre-assembled and include basic tools for setup
- If you are unsure about sizing or specs, contact us before you buy
Full details at Payment & Shipping.
Simple and fair terms so you can buy with confidence.
- 30-day return window — if the bike is not right for you, send it back
- Ride it. It needs to come back clean, undamaged and complete, with the charger, tools and manual
- A refund or replacement is issued after we receive and check the return
Please note:
- For a change of mind we book the collection and deduct its cost from your refund, and we tell you the amount before we book it
- If we sent the wrong item or it arrived faulty, we cover return shipping in full
- All bikes include a 12-month manufacturer warranty as standard
Full details at Returns & Refunds and Warranty.
Write a Review
Share your experience and help other customers make the right choice.
Other Bikes You Might Like
Browse alternative electric bikes suited to a similar riding style or price range. A useful way to compare options before you decide.
More From This Brand
Explore more electric bikes from the same brand, selected for similar quality, performance, and everyday value.
Helpful reading
Guides and reviews to help you decide.
ReviewDYU A5 Review, 14-Inch Folding Electric Bike UK Verdict
The DYU A5 is a compact 14-inch folding electric bike perfect for car-boot storage and short commutes. We compare its motor, battery, comfort and folding to see if it's worth your money in the UK.
Read guide →
Buying GuideBest Folding Electric Bikes UK 2026, Top Picks Compared
Our guide to the top folding electric bikes in the UK for 2026. We compare the best lightweight, portable e-bikes from Biktron’s range, all meeting UK e-bike law. Perfect for city commuters and mixed-mode travel.
Read guide →
ReviewESKUTE F200 Review, Folding Electric Bike Worth the Money?
Our honest ESKUTE F200 review covers everything from unboxing to daily commuting. With a 250W motor, 15.5 mph assist, and a clever fold, it promises great urban utility. But does it deliver on range, build quality, and comfort for the UK streets? Find out before you buy.
Read guide →
Not sure which electric bike is right for you?
Answer a few quick questions and we will help point you towards the bikes that best match your riding style, budget and daily needs. Fast, free, no commitment.
Start the Bike QuizGet £30 Off Your First Order
Sign up to the BikTron newsletter and receive £30 off your first purchase. Be the first to hear about new bikes, special deals, and practical electric bike tips — no spam, just useful updates.
New subscribers only. Discount applied at checkout.
