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Koolux BK6S 4.0 Electric Bike
Motor
500W
Battery
48V 15AH
Speed
15.5 MPH
Range
41 MILES
£899.00
£649.00
Free UK Delivery
Delivered in 3–5 working days
1-Year Warranty
Manufacturer-backed cover
UK Support Team
Quick help with setup, parts & warranty
Authorised Koolux
Genuine brand new stock from manufacturer
Koolux BK6S 4.0 Electric Bike Key Features
Quick Summary
The KOOLUX BK6S 4.0 combines rugged fat‑tyre traction with a powerful 500 W motor and a high‑capacity 48 V 15 Ah battery. Designed for both urban streets and off‑road paths, it delivers stable handling and dependable performance.
Smooth Power Delivery
The 500 W hub motor offers responsive acceleration and smooth pedal‑assist across seven levels, letting you tackle hills and headwinds without strain. A thumb throttle provides instant power when you need a boost.
Comfort & Control
Wide 4.0″ tyres and front suspension absorb bumps and maintain grip on loose or uneven surfaces. Dual mechanical disc brakes ensure consistent, controlled stopping power in all weather.
Smart Battery System
A lockable, removable 48 V 15 Ah battery provides long-range capability and convenient off‑bike charging. Built‑in protection circuits guard against over‑charge, over‑discharge, and overheating for safe, reliable use.
Tech You Can Trust
The clear backlit LCD displays speed, battery level, distance travelled, and assist mode at a glance. Simple handlebar controls let you switch assist levels and monitor ride data easily.
Built for Everyday Use
With its durable frame, fat‑tyre stability, and straightforward folding rack mount design, the BK6S 4.0 is ready for daily commutes, weekend adventures, and everything in between—wherever you choose to ride.
Koolux BK6S 4.0 Electric Bike Specifications
| Brand | Koolux |
|---|---|
| Bike Type | City & Commuter, Folding, Fat Tyre |
| Motor Power | 500W |
| Battery | 48V 15AH |
| Maximum Speed | 15.5 MPH |
| Maximum Range | 41 Miles |
| Charging Time | 5+ Hours |
| Shock Absorbers | Front |
| Brakes | Dual Mechanical Disc Brakes |
| Bike Weight | 27KG |
| Max Climb | 15 degrees |
| Max Rider Weight | 150KG |
Download Product Manual (PDF)
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Watch Assembly Video
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Quick Summary
The KOOLUX BK6S 4.0 combines rugged fat‑tyre traction with a powerful 500 W motor and a high‑capacity 48 V 15 Ah battery. Designed for both urban streets and off‑road paths, it delivers stable handling and dependable performance.
Smooth Power Delivery
The 500 W hub motor offers responsive acceleration and smooth pedal‑assist across seven levels, letting you tackle hills and headwinds without strain. A thumb throttle provides instant power when you need a boost.
Comfort & Control
Wide 4.0″ tyres and front suspension absorb bumps and maintain grip on loose or uneven surfaces. Dual mechanical disc brakes ensure consistent, controlled stopping power in all weather.
Smart Battery System
A lockable, removable 48 V 15 Ah battery provides long-range capability and convenient off‑bike charging. Built‑in protection circuits guard against over‑charge, over‑discharge, and overheating for safe, reliable use.
Tech You Can Trust
The clear backlit LCD displays speed, battery level, distance travelled, and assist mode at a glance. Simple handlebar controls let you switch assist levels and monitor ride data easily.
Built for Everyday Use
With its durable frame, fat‑tyre stability, and straightforward folding rack mount design, the BK6S 4.0 is ready for daily commutes, weekend adventures, and everything in between—wherever you choose to ride.
What's included?
1X Koolux BK6S 4.0 Electric Bike (Mostly Built)
1X Charger
2X Keys
1X Assembly Tools
1X Assembly User Manual
Download the Koolux™ app
Use the brand’s official app for setup guides, and direct manufacturer support if available .
Customer Reviews
Based on 16 reviews
81%
(13)
19%
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I
Feels solid and well put together for the price.
Great to hear — shout if you need anything.
C
Very good bike. Uk legal. Climbs hills with ease. Very fast delivery and brilliant customer support. Would 100% recommend.
A
Motor is quiet and the assist comes in smoothly.
Appreciate the feedback, enjoy the rides.
J
Very happy with the bike. Had an issue with it cutting out. They asked for a video and sent a new battery straight out. Arrived at my door two days later. Had no issues since great bike and customer service 👍
M
Very happy with bike , 3 day uk delivery , tracking worked fine, bike needs front wheel attaching, tyres pumping up, front caliper needed adjusting , nothing unexpected, bike comes with tool kit, pump, comprehensive manual, bike exactly as listing. Goes very well ! Lots of power , arrives set at 15.5 mph , throttle not fitted (but included) for use on private land of course. Seller highly recommend, had couple of questions that were answered straight away, great bike at great price ! 👍 😃 , very well packaged
Koolux BK6S 4.0 Electric Bike FAQs
The comes mostly assembled and only minor things need to be assembled. This should not take longer than 20-30 minutes to do.
- Your product will be delivered within 3-5 working days via one of our trusted couriers (DPD, Parcelforce, BJS Home Delivery, DX Delivery)
- Tracking information is provided upon dispatch.
- We do not ship to northern Ireland.
Delivery, Returns & Warranty
Free Delivery on all orders. Your product will be delivered within 3-5 days via Express Delivery. We use a panel of trusted couriers such as DPD, UPS, Fedex, DHL. Tracking information is provided upon dispatch.
