SPEED15.5 Mph
RANGE37 Miles
MOTOR250W
BATTERY13Ah
WEIGHT55 lbs
Adjustable Cycle Helmet£38.99
Front and Rear Light Set£44.99
In stock now, a similar model
Aairsk S800 Removable Battery City Electric Bike 26"£579.00In stockView
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 468 Wh of battery. The maker quotes 37 mi; in mixed riding with some hills, expect nearer 28 mi. A full charge costs about £0.13. Across a year that is roughly £982.00 less than making the same journeys by car, so the bike pays for itself in about 7 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 | 37 mi |
|---|---|
| Mixed riding, some hills | 28 mi |
| Full assist, loaded or hilly | 20 mi |
| Riding time on a charge | 2 h 23 min |
What it costs to run
| A full charge | £0.13 |
|---|---|
| Every 100 miles | £0.35 |
| Electricity for a year | £8.00 |
| The same year by car | £990.00 |
| You keep | £982.00 |
| Pays for itself in | 7 months |
Worked out from the specification
| Battery energy | 468 Wh |
|---|---|
| Energy per mile | 12.6 Wh |
| Power to weight | 10.0 W/kg |
| You can carry | 330 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.
330 lbs of payload on a bike that costs £549
The AAIRSK SU7 carries 330 lbs, runs a 250W motor with 45 Nm of torque, and rolls on 24-inch wheels, at £549, down from £699.
250W and 15.5 mph: it meets the EAPC rules, so there is no licence, no tax and no registration.
330 lbs is a serious payload at this price
That is more than 37% of what we sell, on a bike this cheap.
- It counts you and everything on the bike, together
- Subtract your own weight before you order
- The frame is aluminium, so it will not rust in a damp shed
- And the bike itself weighs 55 lbs
24-inch wheels, which is an unusual size
Most bikes here run 20-inch or 26-inch. This one sits between them.
A 24-inch wheel rolls over a pothole better than a 20 and stays more manageable than a 26, and it lowers the standover height without shrinking the bike. It is a sensible size for a rider who finds a full-size frame too tall.
45 newton metres from a legal motor
Torque is what gets you off the line at a junction and up a hill without a run-up.
Rated power tells you nothing about that: two 250W bikes can behave very differently, and torque is what decides it. Forty-five is modest but honest for city riding.
37 miles from a 13Ah battery
A 36V pack, with a range better than 25% of our catalogue.
The panel below turns that capacity into energy per mile and gives you three worked estimates. Take the middle one: the headline figure on any electric bike assumes flat ground and real pedalling.
The brakes are mechanical, and you should know that
Cable discs front and rear, rather than hydraulic.
On a 250W bike capped at 15.5 mph this is a fair trade at £549: they stop well, they just want the cable tension checking now and then. It is the line to know before you order rather than after.
What we know about this bike, and what we do not
This model reached our catalogue before we started archiving our suppliers' own spec sheets, so there is no original table for us to check ours against.
What the table below shows comes from our own record and nothing has been added to it on a guess. AAIRSK does not publish a charging time for this model and that row stays empty. If a specific measurement decides your purchase, write to us before you order and we will measure it rather than guess.
Before the first ride, and who it is for
It arrives nearly built.
- Fit the front wheel, the handlebars and the pedals
- Bed the two mechanical brakes in at walking pace and set the cable tension
- Check that tension again after the first ride
- Inflate both 24-inch tyres
- Charge it fully before the first long ride
Buy it for the payload and the wheel size at this money. It is a legal city bike that carries more than most of the bikes above it in the range.
- BRAND
- Aairsk
- CATEGORY
- City
- MOTOR POWER
- 250W
- RANGE
- 37 Miles
- SPEED
- 15.5 Mph
- BATTERY
- 13Ah
- WEIGHT
- 55 lbs
- CHARGING TIME
- N/A
- BRAKE SYSTEM
- Mechanical Disc
- FRAME MATERIAL
- Aluminium
- MAXIMUM LOAD
- 330 lbs
- INPUT VOLTAGE
- 36V
- TIRE SIZE
- 24 inch
- TORQUE
- 45 Nm
The AAIRSK SU7 City Electric Bike states 250W, 37 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.
7 of 10 specifications differ. View DYU A1F Electric Folding Bike
- 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.
Customer Reviews
5.00 out of 5
Based on 1 reviews
Excellent bike for the money! Very comfortable in the city, battery is good and ride feels smooth. Best value, cant complain at all.
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.
Cyrusher Trax Hybrid All-Terrain Electric Bike
18+, UK residents. Credit subject to status. Terms apply.
More From This Brand
Explore more electric bikes from the same brand, selected for similar quality, performance, and everyday value.
AAIRSK GT900 Mountain Electric Bike
Aairsk S800 Removable Battery City Electric Bike 26"
AAIRSK XT90 Electric Mountain Bike
AAIRSK GT300 Mountain Electric Bike
AAIRSK X5 20" Fat Tyre Electric Mountain Bike
18+, UK residents. Credit subject to status. Terms apply.
Helpful reading
Guides and reviews to help you decide.
ReviewAAIRSK SU7 City Electric Bike Review, Style Meets Value
The AAIRSK SU7 City Electric Bike blends a sleek step-through frame with smooth pedal assist. In this honest review we compare its range, comfort, motor power and UK road legality. Is it the best value city e-bike for everyday riding?
Read guide →
ReviewAAIRSK S600 Review, Shimano 7 Speed City E-Bike
The AAIRSK S600 mixes mountain bike stability with city-friendly Shimano 7-speed gears. We assessed its published specifications and £599 price.
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.