KOOLUX BK6S Folding Electric Bike | 750W Motor | 48V 13Ah Battery | 20×4.0 Fat Tyres

Koolux

£669.00

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Color: Black

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The KOOLUX BK6S is a folding electric bike built for riders looking for strong motor performance, wide tyres and a practical folding frame. It combines a brushless rear hub motor with a 48V lithium battery, Shimano 7-speed gearing and 20 × 4.0 inch fat tyres.

The bike is equipped with a 750W motor and is specified with a maximum speed of up to 50 km/h. Its wide tyres provide additional traction and stability across suitable private-land surfaces, while the front suspension system helps absorb impacts from uneven terrain.

A removable 48V 13Ah lithium battery provides a manufacturer-stated assisted range of approximately 45–90 km, depending on rider weight, terrain, weather, riding mode and other conditions. The folding aluminium alloy frame allows the bike to be stored more compactly when required.

The BK6S 4.0 also includes mechanical disc brakes, Shimano 7-speed gearing, an LCD display, integrated lighting and IP54-rated protection. Its combination of wide tyres, suspension and folding construction makes it suitable for recreational and off-road riding where legally permitted.

Key Features

750W Brushless Rear Hub Motor
48V 13Ah Lithium Battery
Removable Battery Design
Maximum Speed Up to 50 km/h
Manufacturer-Stated Range: 45–90 km
20 × 4.0 Inch Fat Tyres
Front Fork Suspension
Shimano 7-Speed Transmission
Mechanical Disc Brakes
Foldable Aluminium Alloy Frame
LCD Display
Integrated Front & Rear Lighting
IP54 Water-Resistance Rating
Maximum Load Capacity: 120 kg
Compact Folding Design

Technical Specifications

Specification	Details
Brand	KOOLUX
Model	BK6S
Bike Type	Folding Electric Bike
Motor	750W Brushless Rear Hub Motor
Battery	48V 13Ah Lithium Battery
Battery Type	Removable Lithium-Ion Battery
Maximum Speed	Up to 50 km/h
Range	Approximately 45–90 km
Wheel Size	20 × 4.0 Inches
Tyres	20 × 4.0 Inch Fat Tyres
Suspension	Front Fork Suspension
Brakes	Mechanical Disc Brakes
Gearing	Shimano 7-Speed
Motor Position	Rear Hub
Frame Material	Aluminium Alloy
Water-Resistance Rating	IP54
Maximum Load	120 kg
Charging Time	Approximately 6.5–7 Hours
Expanded Dimensions	1820 × 600 × 1100 mm
Folded Dimensions	960 × 380 × 750 mm
Net Weight	Approximately 34.2 kg
Certification Listed by Manufacturer	CE / UKCA

Why Choose This Product

High-output 750W brushless rear hub motor
48V 13Ah removable lithium battery
Wide 20 × 4.0 inch tyres for enhanced traction
Front suspension for improved comfort over uneven surfaces
Shimano 7-speed gearing
Mechanical disc braking system
Foldable aluminium alloy frame
LCD display for monitoring riding information
Integrated lighting for improved visibility
IP54-rated design
Suitable for recreational and off-road riding on permitted private land

FAQ

What motor does the KOOLUX BK6S use?

The BK6S 4.0 uses a 750W brushless rear hub motor.

What battery does the BK6S 4.0 have?

It is equipped with a removable 48V 13Ah lithium battery.

What is the maximum speed?

The current KOOLUX specification lists a maximum speed of up to 50 km/h.

What range can the bike achieve?

The manufacturer states an approximate range of 45–90 km. Actual range varies according to rider weight, terrain, weather, riding mode, tyre pressure, and other conditions.

Does the BK6S fold?

Yes. The aluminium alloy frame features a folding design. The stated folded dimensions are approximately 960 × 380 × 750 mm.

Does it have suspension?

Yes. The BK6S 4.0 is equipped with front fork suspension to improve comfort over suitable uneven surfaces.

What gearing does it use?

The bike uses a Shimano 7-speed transmission.

Is the KOOLUX BK6S EAPC compliant in the UK?

No. The current specification identifies a 750W motor and a maximum speed of up to 50 km/h. These specifications exceed the principal UK EAPC limits of a maximum 250W continuous rated motor and motor assistance cutting off at 25 km/h. It should therefore not be advertised as a UK EAPC-compliant bicycle based on these specifications.

Off-Road Compliance Notice

⚠️ PRIVATE LAND / OFF-ROAD USE ONLY

This KOOLUX BK6S specification is equipped with a 750W motor and has a manufacturer-listed maximum speed of up to 50 km/h. These specifications exceed the principal UK EAPC limits.

This model should not be represented as a UK EAPC-compliant bicycle. Use on public roads, cycle tracks or other areas subject to UK EAPC requirements may require a different legal classification, registration, insurance or other permissions.

For UK customers, use this specification only on private land or other areas where its use is legally permitted. The purchaser is responsible for checking and complying with all applicable laws before use.

Delivery & Shipping

At WheelTrek, we keep delivery simple and transparent. Please note we currently deliver within the UK only.

Delivery Costs

FREE DELIVERY on all eBikes to UK Mainland addresses.
For orders below £500, a £25 delivery charge applies.

Order Processing

Once you place your order, it takes 1 to 2 working days to process and prepare for dispatch.

Delivery Times

After dispatch, estimated delivery is 3-5 business days (Monday to Friday) under normal conditions.
We will send you the courier name and a tracking number as soon as your order is dispatched, so you can follow your eBike's journey to your door.

Our Carriers

Your eBike is delivered by a trusted, fully tracked UK courier. The exact courier depends on the eBike you order. We will confirm which one is handling your delivery along with your tracking details.

Warranties & Returns

Shopping with us is simple and your rights are fully protected.

Changed your mind?

You have 14 days from delivery to cancel for any reason, then 14 days to send the item back. Return delivery is at your cost, and we refund you in full within 14 days of receiving the eBike back.

Faulty, damaged or not as described?

Contact us within 30 days with a photo and we will arrange free courier collection and a full refund, or a replacement if you prefer. After 30 days, you are still covered for a free repair or replacement.

Warranty

Every eBike comes with a full manufacturer's warranty. If anything goes wrong, one email to us and we handle the claim with the manufacturer for you.

How to start a return

Just email info@wheeltrek.co.uk before sending anything back and we will take care of the rest.

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Why Our Customers Choose Wheeltrek

FREE & FAST SHIPPING

FREE DELIVERY for all eBikes across UK mainland, ensuring a smooth and easy shopping experience

WARRANTY & RETURNS

All of our products come with a warranty and 14 day hassle free returns giving you complete confidence T&Cs apply

BEST PRICE GUARANTEED

We’ll match any lower price you find to ensure you get the best deal every time T&Cs apply

FLEXIBLE FINANCE PLANS

Make your ride more affordable with PayPal, ClearPay, and Cycle to Work schemes to help spread the cost

EXPERT SUPPORT

Our team helps you find the perfect ride and provides ongoing guidance long after your purchase

TRUSTED PREMIUM BRANDS

We offer premium eBikes from trusted brands carefully selected for quality and performance

Have a question? Our team is ready so just reach out.

We’re here to help with all your questions big or small.

Check out some of our most common Q&As to get started.

Can I use Cycle to Work vouchers on your eBikes?

Yes, we work with various Cycle to Work schemes. Check our Cycle to Work partners page to see which providers we accept. If your provider isn't listed, contact us at info@wheeltrek.co.uk. View our partners: https://wheeltrek.co.uk/pages/our-cycle-to-work-partners

What is your return policy?

Your satisfaction means everything to us. To request a return, simply email info@wheeltrek.co.uk within 14 days of receiving your order. Please ensure the item is unused, with tags attached and in its original packaging and return it within the 14-day window.

For full details,
visit: https://wheeltrek.co.uk/pages/return-and-refund-po….

Refunds can take between 5-10 days.

How quickly can I receive my order?

We aim to process and dispatch in-stock orders within 1–2 working days.

Delivery typically takes 3–5 working days. Orders over £500 get FREE UK
mainland delivery.

Timelines may vary by brand. Tracking is emailed within 24 hours of dispatch. We only ship to UK addresses.

Be sure to report any damage within 14 days to info@wheeltrek.co.uk

Are eBikes legal in the UK and where are you allowed to ride them?

Yes, eBikes that meet EAPC (Electrically Assisted Pedal Cycle) regulations
are legal and can be ridden without a licence, insurance or vehicle tax.

eBikes can be used on public roads, cycle paths, and anywhere regular bicycles are allowed but not on pavements.

Do you offer warranties and after sales support?

Yes absolutely! All our products come with a manufacturer’s warranty and our customer service team is here to assist with any issues.

How long does it take to fully charge an e-bike battery and how far can you travel?

Charging times vary depending on the model and battery capacity but most eBikes batteries take between 3 to 6 hours to fully charge. On a full charge, you can typically expect a range of 30 to help 60 miles depending on factors like terrain, rider weight and level of pedal assistance.

Lorna Waite

My eBike has made my commute easier. It’s really cute and such a lovely design. I actually look forward to getting on it every day as it's so much fun.

★ ★ ★ ★ ★

Commute EX Ladies Electric Bike with 15-inch frame and Samsung battery

Simon Capewell

Buying this has been a game changer and is an absolute pleasure to ride. The service was top notch too as the team were really friendly and professional. I can definitely recommend WheelTrek.