isinwheel U3 Foldable Electric Bike
SKU: P64077In Stock
SPEED18.6 Mph
RANGE35 Miles
MOTOR250W
BATTERY7.8Ah
CHARGING2-3 Hours
WEIGHT51 lbs
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 LegislationYour everyday folding companion
The isinwheel U3 is built for commuters, city dwellers and anyone who wants a reliable ride that folds away neatly. With a 250W motor, 35 miles of range and a top assisted speed of 18.6 mph, it gets you across town without fuss. The folding alloy steel frame makes storage simple, whether you live in a flat, commute by train, or keep it in a car boot.
Quiet power for city streets
The U3’s 250W brushless rear hub motor delivers smooth, efficient assistance with a 500W peak output. It’s tuned for UK riding, helping you accelerate from lights and tackle gentle hills without breaking a sweat. Pedal assist and throttle modes let you choose how much effort to put in.
Go further on a single charge
A 36V 7.8Ah lithium battery gives you up to 35 miles of assisted riding. The IP65 waterproof rating means light rain won’t stop you, and a full charge takes just 2–3 hours. With a lifetime of 800 charges, it’s ready for years of daily use.
Comfort that lasts the whole ride
The U3 pairs a front suspension fork with a breathable ergonomic saddle to smooth out rough roads. Adjustable handlebars and seat post let riders from 5′1″ to 6′1″ find a natural upright position. The 16 × 1.75″ pneumatic tyres add extra cushioning on potholed streets.
Stop confidently in any weather
Hydraulic 160mm disc brakes front and rear give you strong, controlled stopping power. The LED headlight (111 lumens) and taillight keep you visible on dark mornings and evening commutes. Ride with confidence, even when the British weather turns.
Clear controls at a glance
The 6.5 × 4.7 cm LCD display shows speed, battery level and assist mode. Throttle modes let you set a maximum of 6.2, 9.3, 15.5 or 18.6 mph. Everything is within thumb’s reach, so you can focus on the road.
Folds small, rides big
The alloy steel frame folds in seconds with no tools, shrinking to 55.9 × 22 × 37 inches for storage. It weighs 51 lbs and carries up to 265 lbs, so it’s sturdy yet portable. In the box you’ll find the U3 e-bike, charger, pedals and user manual.
- BRAND
- isinwheel
- CATEGORY
- Folding
- MOTOR POWER
- 250W
- RANGE
- 35 Miles
- SPEED
- 18.6 Mph
- BATTERY
- 7.8Ah
- WEIGHT
- 51 lbs
- CHARGING TIME
- 2-3 Hours
- BRAKE SYSTEM
- Hydraulic Disc
- FRAME MATERIAL
- Alloy Steel
- MAXIMUM LOAD
- 265 lbs
- INPUT VOLTAGE
- 36V
- TIRE SIZE
- 16 inch
- TORQUE
- N/A
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.
- 14-day return window — if the bike is not right for you, send it back
- The bike must be unused, in original packaging, with all accessories included
- A refund or replacement is issued after we receive and check the return
Please note:
- Returns for change of mind must meet the unused and original condition requirement
- 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.
Customer Reviews
No approved reviews yet. Be the first to share your experience!
Write a Review
Share your experience and help other customers make the right choice.
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.
Brand ReviewIs AAIRSK a Good Electric Bike Brand? Honest 2026 Verdict
Thinking about an AAIRSK electric bike? We break down the brand’s models, performance, and customer support so you can decide if they’re worth your money.
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 →
ReviewAAIRSK S800 Review, 26 Inch City Electric Bike (2026)
We compared the AAIRSK S800 26 inch city electric bike for 2026 from published specifications and UK law. Get our honest UK review of range, build quality, road legal limits and value for money.
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.
