Name: KOOLUX X9 Fat Tyre Electric Bike
Brand: Koolux
SKU: 5468
Price: 799 GBP
Availability: InStock

Home
/
Shop
/
Electric City Bikes
/
KOOLUX X9 Fat Tyre Electric Bike

KOOLUX X9 Fat Tyre Electric Bike

Shop the KOOLUX X9 fat tyre electric bike for city rides and mixed-terrain use, with front suspension, Shimano 7-speed and up to 37-50 miles range.

£799.00

£899.00Save £100.00

3 payments of £266.33 at 0% interest with klarna

Delivered by Thursday if you order within 2 hrs 53 min

SPEED15.5 Mph
RANGE37 Miles
MOTOR250 W
BATTERY15.6 Ah

Road Legal

See full UK Road Legal.

Not sure which bike suits you best? Try our Bike Finder.

Secure checkout with card, PayPal, Apple Pay, Google Pay, Klarna and Clearpay.

UK Stock - Fast and free delivery across the UK from Birmingham.

Road Legal - Shop with confidence using clear guidance on road-legal UK e-bikes.

Warranty - Includes a 12-month manufacturer warranty for extra peace of mind.

UK Support - Helpful UK support before purchase and after your bike arrives.

Need help? Chat with us for quick clarifications

Description

Product Overview

The KOOLUX X9 Fat Tyre Electric Bike is built for riders who want stable, comfortable performance across city streets and mixed terrain. With 20×4.0 inch Kenda air tyres, front suspension and an aluminium alloy frame, it is a practical choice for everyday riding and weekend adventures.

A 250W motor, multifunctional LCD display and Shimano 7-speed drivetrain give you a straightforward, versatile ride. Disc brakes add confident control, while the fat tyre setup helps improve balance and grip on rougher surfaces.

Key Features

Here are some of the standout features of the KOOLUX X9 250W 20″ Fat Tyre E-Bike:

250W motor for smooth electric assistance
48V 31.2Ah Lithium-Ion battery with a stated range of 37-50 miles
20*4.0 inch Kenda air tyres for added stability and mixed-terrain capability
Suspension front fork for improved comfort on uneven surfaces
Shimano 7-Speed drivetrain for flexible riding across different routes
Disc brakes for dependable stopping control
Multifunctional LCD display for clear ride information

What to Expect

Expect a steady, comfortable ride with a top speed of 15.5 mph and support for journeys ranging from daily commutes to longer leisure rides. The fat tyres, front suspension and 7-speed gearing help the bike feel capable on both urban roads and rougher paths.

What’s Included

Electric bike
Battery
Charger
User manual

Assembly & Setup

Assembly and setup are straightforward. Once the bike is prepared, charge the battery fully, check the display and brakes, and make any basic adjustments needed for a comfortable ride.

Support After Purchase

After your purchase, you can expect ongoing support for getting started with your KOOLUX X9, including help with setup, basic operation and day-to-day use.

Technical Specifications

Motor	250W
Battery	48V 31.2Ah Lithium-Ion
Display	Multifunctional LCD Display
Top Speed	15.5 mph
Range	37-50 miles
Climbing Angle	Up to 25°
Frame	Aluminum Alloy
Front Fork	Suspension Front Fork
Drivetrain	Shimano 7-Speed
Tyres	20*4.0 inch Air Tires (Kenda)
Package/Net Weight	36.4 kg
Charging Time	7.5-8.5 hours
Maximum Load	120 kg (265 lbs)
Water Resistance	IP54

UK Road Use & Legal Information

Road Legal (EAPC)

These bikes are built to comply with UK Electrically Assisted Pedal Cycle (EAPC) regulations, meaning they 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). You can read the official requirements on the UK government website.

Configurable Models

Some bikes are supplied in a restricted, road-legal setup but are capable of higher performance. If modified or used beyond EAPC limits, they may no longer qualify as road legal and could be classified as motor vehicles under UK law. This may require registration, insurance, and a driving licence. For full guidance, please refer to the official UK e-bike rules.

Private Use Only

Certain high-performance models are intended strictly for private land use with the landowner’s permission. These bikes do not meet EAPC standards and cannot be used on public roads, cycle paths, or pavements unless fully registered and insured in accordance with UK law.

If you're unsure which option is right for you, our team is here to help. Feel free to contact us before purchasing for clear guidance and peace of mind.

Returns & Delivery

Fast UK Delivery

We offer fast and reliable delivery across the UK, with most bikes dispatched within 24–72 hours and usually arriving in 3–7 working days. Every order is shipped with trusted couriers and includes tracking, as explained in our payment and shipping page, so you can follow your delivery from dispatch to arrival.

Shipping Information

Standard UK shipping is free on most bikes. Orders placed after 12 PM may ship the next working day, and some remote areas may have extra delivery charges. If a delivery is missed or returned after failed attempts, additional shipping fees may apply, as detailed in our shipping policy.

14-Day Returns

You can return your bike within 14 days of delivery as long as it is unused, in its original condition, and includes all accessories, manuals, and packaging. Please contact us first before sending anything back, following the steps outlined in our returns and refunds policy.

Refund Policy

Once your returned bike is received and inspected, approved refunds are issued to your original payment method within 2–5 business days. If the item arrives faulty, damaged, or incorrect, we cover return shipping and provide a full refund, as explained in our refund guidelines.

Customer Reviews

See why riders choose BikTron for value, delivery speed, and after-sales support.

Jakob Russ (London)

"Great experience with Biktron.uk. Fast delivery, excellent customer service, and the bike quality is outstanding for the price. Everything was smooth from order to delivery. Highly recommend!"

Amelia R. (Manchester)

"Customer support was fantastic and helped me pick the right frame size within an hour. Klarna instalments made the purchase stress-free, and the bike’s motor is quiet yet powerful. I’ve already done several long rides and the range is better than expected."

Jacob S. (Bristol)

"My courier was delayed by a day, but BikTron kept me fully informed and even followed up to check delivery. The bike handles hills far better than I imagined and feels solid on longer rides. Overall, very happy with the purchase and the service."

Sophie M. (Leeds)

"Ordering was simple and I loved the clear specs and photos online. The bike arrived well protected, and setup took less than 20 minutes. It rides beautifully — smooth, fast, and stable — and I’m already recommending BikTron to friends who want great value."

View All Reviews