£16.99
£19.99
Brand:
Koolux BK6S 4.0 Electric Bike
Motor
500W
Battery
48V 15AH
Speed
15.5 MPH
Range
41 MILES
£899.00
£659.99
In stock
12 sold this week
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£18.69
£21.99
Bike Assembly & 36 Point PDI Check
5-7 Working Days Delivery
Optional
£99.99
£129.00
Optional service: All products can be assembled at home without adding this option.
Handlebar and cockpit setupBrake setup and adjustmentChain tension and drivetrain checkTyre pressure and wheel checkPedal, crank and key bolt checkBattery, assist and display checkFinal PDI safety inspection
Home Delivery Tracked options shown at checkout
Delivery options
Choose your delivery option at checkout. Availability may vary by product, stock location and postcode.
Trusted delivery partners
- Tracking details are sent once your order has been dispatched
- Some large, heavy or specialist items may arrive with a dedicated courier
- Remote areas, Highlands, islands and non-mainland postcodes may require extra time or a delivery surcharge
Returns
- 30-day returns on unused items
- Used items cannot be returned for change of mind
Click & Collect View collection options
Collection options
Collection timing depends on whether the product is already held at our Nuneaton workshop. You can contact us before ordering to check, or we will confirm the collection estimate after your order is placed.
- Select Pickup in store at checkout
- We will confirm your collection day after your order is placed
- Please wait for our collection confirmation before travelling
Price Promise Found the same product for less?
Our Price Promise
Found the same product for less? Send us the live offer before ordering.
- We price match genuine UK retailer offers before you order
- The model, specification, colour, condition, stock status and delivery terms must match
- Marketplace sellers, used products, finance-only pricing, private codes, clearance offers and obvious pricing errors may be excluded
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Payment Options at Checkout
From 3 to 12 months, product dependent
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Warranty, Parts & Support Covered View warranty details
Warranty period
12 months against manufacturing defects.
What’s covered
Confirmed production faults affecting the original frame and factory-installed electrical or mechanical components.
Replacement parts
We sell replacement parts and accessories for many products. Contact us with the model and part required.
Description
Quick Summary
The KOOLUX BK6S 4.0 combines rugged fat‑tyre traction with a powerful 750W motor and a high‑capacity 48 V 13 Ah battery. Designed for both urban streets and off‑road paths, it delivers stable handling and dependable performance.
Smooth Power Delivery
The 750W 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.
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 |
Dimensions |
|
| Built Dimensions | 182 × 60 × 110 cm (L × W × H) |
| Box Dimensions | 93 × 55 × 76 cm (L × W × H) |
What’s Included in the Box
1 x Koolux BK6S 4.0 Electric Bike
1 x Charger
2 x Keys
1 x Tool Kit
1 x User Manual
Koolux BK6S 4.0 Electric Bike FAQs
Koolux BK6S 4.0 Electric Bike
£659.99