Koolux BK6S 4.0 750W High-End Folding E-Bike

⚠️ High-Power e-bike – Motor: 750W

4.8 16 online reviews

Koolux

£714.99

~~£999.99~~ £714.99 ON SALE SOLD OUT

You Save 29% (£285.00)

Color: Black

Quantity

Shop With Confidence

Full Warranty Included

Fast UK Dispatch

Easy 14 Day Returns

Free Mainland Delivery

Flexible Finance Options

UK Customer Support

Safe & Secure Checkout

Genuine Customer Reviews

Have a Question? Get In Touch

Call Us: 01332 480 564 Email Us

The BK6S 4.0 750W High-End Folding E-Bike is designed to solve one of modern urban life’s biggest challenges: efficient, flexible, and cost-effective transportation. Whether you’re navigating busy city streets, commuting to work, or exploring weekend trails, this powerful yet lightweight folding e-bike delivers performance without compromise.

Ideal for daily commuters, adventure seekers, and riders with limited storage space, this e-bike folds neatly for easy transport on trains, in car boots, or compact flats. Its robust motor and rugged design also make it suitable for electric mountain bike UK trails, giving riders the freedom to move seamlessly between city and off-road terrain.

Unlike standard foldable bikes, the BK6S 4.0 combines high torque power, extended range, and durable components — making it one of the best electric foldable bikes UK riders can rely on in 2026.

Key Features

Powerful 750W high-performance motor for hills and acceleration
Compact, folding frame for easy storage and transport
Long-range battery ideal for an e-bike for commuting
Fat tyres for stability on roads, gravel, and trails
Advanced suspension for comfort on rough UK terrain
LCD display with pedal-assist modes
Designed to meet UK road legal electric bike requirements when configured correctly

Technical Specifications

Feature	Specification
Motor	750W High-Torque Motor
Battery	Removable Lithium Battery
Frame	Folding Aluminium Alloy
Tyres	Fat Tyres – All Terrain
Suspension	Front Shock Absorption
Display	LCD Smart Display
Brakes	Dual Disc Brakes
Usage	Urban, Trails, Commuting
Foldable	Yes
Weight	Lightweight Folding Design

Why Choose the BK6S 4.0 750W Folding E-Bike?

If you’re searching for the best electric bikes UK 2026, the BK6S 4.0 stands out for its rare combination of power, portability, and versatility. Many folding e-bikes sacrifice performance — this one doesn’t. It outperforms competitors with its stronger motor, trail-ready tyres, and commuter-friendly folding frame, making it one of the best e-bikes for commuting UK riders will trust long-term.

FAQs

Is this e-bike suitable for daily commuting?
Yes, it’s designed as a reliable e-bike for commuting, offering comfort, speed, and easy storage.

Can it handle UK trails and uneven roads?
Absolutely. Its fat tyres and suspension make it ideal for electric mountain bike UK trails.

Is it easy to store in small spaces?
Yes, the folding design makes it perfect for flats, offices, and car boots.

UK Road Legal Disclaimer

This e-bike can be UK road legal when configured in accordance with EAPC regulations (motor output limits, speed restrictions, and pedal-assist use). Always check local UK regulations before riding on public roads.

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.

View full details

4.8

16 online ratings

Koolux BK6S 4.0 750W High-End Folding E-Bike Review Summary

4.8

16 online ratings

Why Our Customers Love It

This folding electric bike is highly regarded for its robust performance and versatility across different environments. Riders frequently praise the impressive power that makes tackling inclines effortless, alongside the wide tires that ensure a smooth and stable experience on various surfaces. The practical design allows for easy storage and transportation, making it a reliable choice for both daily commuting and recreational adventures.

Benefits Include

Powerful Motor Performance: The high-wattage motor provides excellent acceleration and the ability to climb steep hills without losing momentum.
All-Terrain Versatility: Wide fat tires allow for a comfortable ride on diverse surfaces like sand, gravel, and snow by providing superior grip.
Folding Design Convenience: The ability to collapse the frame makes it easy to store in tight spaces or transport inside a vehicle trunk.
Exceptional Battery Range: Users highlight the long-lasting battery capacity which supports extended rides and long commutes on a single charge.

Why Our Customers Choose Wheeltrek

FREE & FAST SHIPPING

FREE DELIVERY for all eBikes in UK mainland delivery, 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 bikes 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.

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 e-bikes legal in the UK and where are you allowed to ride them?

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

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

Do I need a licence to ride an e-scooter?

Privately owned e-scooters are currently illegal on public roads but rental
e-scooters require at least a provisional driving licence.

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 e-bike batteries take between 3 to 6 hours to fully charge. On a full charge, you can typically expect a range of 30 to 100 miles depending on factors like terrain, rider weight and level of pedal assistance.

Lorna Waite

My e-bike 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.