- 321, Kenton Road Harrow, London, HA3 0XN
Original price was: £700.00.£599.00Current price is: £599.00.
The KOOLUX BK6S 4.0 Electric Bike combines powerful performance, comfort and practicality in a compact folding design. Featuring a 750W rear hub motor, 48V 13Ah removable battery and 20 × 4.0-inch fat tyres, it delivers a stable and comfortable ride across a variety of terrains.
With front suspension, Shimano 7-speed gearing, an LCD display and a foldable aluminium frame, the BK6S 4.0 is ideal for leisure rides, exploring and everyday adventures. Its combination of strong electric assistance, rugged fat tyres and convenient folding design makes it a versatile choice for riders looking for power and portability.
Discover a new way to ride with the KOOLUX BK6S 4.0 Electric Bike – a powerful, foldable fat-tyre e-bike designed to combine performance, comfort and everyday practicality.
Equipped with a 750W rear hub motor, 48V 13Ah lithium battery and chunky 20 × 4.0-inch fat tyres, the BK6S 4.0 is built to handle everything from everyday journeys and leisure rides to rougher paths and challenging terrain. Its folding frame also makes storage and transportation considerably easier than with a conventional full-size e-bike.
Whether you’re looking for an electric bike for recreational riding, travelling, camping or exploring further afield, the BK6S 4.0 delivers a confident and versatile riding experience.
At the heart of the KOOLUX BK6S 4.0 is a powerful 750W rear hub motor, providing strong electric assistance when accelerating, tackling inclines and riding across varied terrain.
The rear-mounted motor delivers power directly to the back wheel, giving the bike a responsive and engaging feel while helping make demanding rides easier.
Motor: 750W
Motor Type: Rear Hub Motor
Maximum Manufacturer-Stated Speed: Up to 50 km/h*
Go further between charges with the 48V 13Ah lithium battery.
KOOLUX states a maximum assisted range of approximately 45–90 km, depending on riding conditions. Actual range will vary according to rider weight, assistance level, speed, terrain, gradients, temperature and tyre pressure.
The removable battery design also gives you greater flexibility when charging, particularly if storing the bike somewhere without convenient access to a power socket.
Battery: 48V 13Ah
Assisted Range: Approx. 45–90 km*
Charging Time: Approx. 6.5–7 hours
One of the defining features of the BK6S 4.0 is its substantial 20 × 4.0-inch fat tyres.
Their wide footprint provides excellent stability and grip while adding extra cushioning between the rider and the road. They’re well suited to a variety of riding surfaces, from paved routes and country paths to gravel and other suitable uneven terrain.
The result is a planted, confidence-inspiring ride combined with the distinctive appearance of a fat-tyre electric bike.
The BK6S 4.0 features front fork suspension to help absorb bumps and vibrations from uneven surfaces.
Combined with the oversized fat tyres, the suspension makes the bike more comfortable when travelling over rougher ground and helps give the rider greater control.
Electric assistance is complemented by a Shimano 7-speed transmission, allowing you to select a suitable gear for changing riding conditions.
Shift down when approaching inclines or select a higher gear when travelling comfortably on flatter surfaces. This combination of conventional gearing and electric assistance gives you greater flexibility over how you ride.
Keep essential riding information directly in front of you with the handlebar-mounted multifunction LCD display.
The display provides convenient access to key information such as your speed, battery status, distance and electric assistance settings, helping you manage your journey without unnecessary distractions.
Despite its rugged fat-tyre construction, the KOOLUX BK6S 4.0 features a practical folding frame.
When folded, the bike measures approximately 960 × 380 × 750 mm, making it easier to store at home, place in suitable vehicles or take along on camping and leisure trips.
Unfolded Dimensions: Approx. 1820 × 600 × 1100 mm
Folded Dimensions: Approx. 960 × 380 × 750 mm
The BK6S 4.0 uses a mechanical braking system designed to provide controlled stopping performance.
Combined with the wide tyres and stable frame geometry, the braking system gives the rider predictable control during everyday riding.
Practicality is an important part of the BK6S 4.0 design. Depending on market specification, features can include a rear luggage rack, full-length mudguards, front lighting and rear safety lighting, making the bike well equipped for everyday journeys and recreational riding.
Its folding design is particularly useful for riders with limited storage space and those looking for an electric bike to accompany them on holidays, camping trips or other adventures.
With an IP54 water-resistance rating, the BK6S 4.0 is designed to offer protection against everyday dust and water exposure.
Its aluminium-alloy construction combines durability with a practical folding design, while the substantial tyres and front suspension make it capable of handling a wide variety of suitable surfaces.
Model: KOOLUX BK6S 4.0
Bike Type: Folding Fat-Tyre Electric Bike
Motor: 750W Rear Hub Motor
Battery: 48V 13Ah Lithium Battery
Maximum Speed: Up to 50 km/h*
Assisted Range: Approx. 45–90 km*
Tyres: 20 × 4.0 inch
Gearing: Shimano 7-Speed
Suspension: Front Fork Suspension
Brakes: Mechanical
Display: Multifunction LCD
Frame: Aluminium Alloy
Charging Time: Approx. 6.5–7 Hours
Water Resistance: IP54
Maximum Load: 120 kg
Net Weight: Approx. 34.2 kg
Unfolded Size: Approx. 1820 × 600 × 1100 mm
Folded Size: Approx. 960 × 380 × 750 mm
Depending on the package supplied, the BK6S 4.0 can include:
The KOOLUX BK6S 4.0 brings together the versatility of a folding e-bike and the confidence of a fat-tyre design.
From its powerful rear hub motor and long-range battery to its front suspension, Shimano gearing and wide 4-inch tyres, every element has been designed to create a capable and enjoyable electric bike.
Fold it. Store it. Take it with you. Then unfold it and start exploring.
Please note: Range, maximum speed and performance figures are manufacturer-stated specifications and can vary significantly depending on rider weight, terrain, gradient, weather, tyre pressure, battery condition and riding mode.
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