Koolux BK6S 4.0 Electric Bike
Delivery Information
- This item is currently sold out and isn’t available for immediate dispatch
- If you need a confirmed ETA, contact us with the product name and we’ll check the next incoming stock
- Use the “Notify me when available” / restock alert on this page (if enabled) to get an instant email when it returns
- We can also recommend an in-stock alternative if you tell us your budget and use-case
- Returns accepted within 30 days for unused items
- No returns for change of mind once used
Warranty Information
- 1-year manufacturer warranty (manufacturing defects under normal use)
- Covers faulty components or defects confirmed by the manufacturer
- Excludes wear & tear items (e.g. tyres, tubes, brake pads), accidental damage, misuse, water ingress, and unauthorised modifications
- If an issue occurs, contact our support team with your order number plus photos/video where possible
- We’ll help diagnose the fault and arrange the next step (repair, replacement parts, or warranty support where applicable)
Koolux BK6S 4.0 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 Specifications
| Collection | Electric Bikes |
|---|---|
| Brand | Koolux |
| Bike Type | City & Commuter, Folding, Fat Tyre |
| Motor Power | 500W |
| Battery | 48V 15AH |
| Top Speed | 15.5 MPH |
| Max 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 |
What inside the box?
1X Koolux BK6S 4.0 Electric Bike (Mostly Built)
1X Charger
2X Keys
1X Assembly Tools
1X Assembly User Manual
Customer Reviews
Feels solid and well put together for the price.
Great to hear — shout if you need anything.
Very good bike. Uk legal. Climbs hills with ease. Very fast delivery and brilliant customer support. Would 100% recommend.
Motor is quiet and the assist comes in smoothly.
Appreciate the feedback, enjoy the rides.
Koolux BK6S 4.0 FAQs
Delivery & Returns
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