✔2-year warranty ✔Ship from EU warehouse ✔CE certified

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KOOLUX Ebike  |  SKU: KL-EU-BK6S-4.0

BK6S 4.0 Folding Ebike

€889,00
Shipping calculated at checkout.

2 Year Warranty

Every KOOLUX e-bike and e-scooter comes backed by a 2-year warranty, giving you peace of mind with every mile. We cover all manufacturer and material defects—so you can focus on the ride, not the repairs.

CE Certified

Our ebikes are officially certified by CE, ensuring compliance with top-tier European safety and quality standards.

2 years

Free manufacturers warranty available

CE Cerified

Ensuring compliance with top-tier quality standards

Power Meets Versatility: KOOLUX BK6S 4.0 Folding Electric Bike

The KOOLUX BK6S 4.0 takes everything riders loved about the 3.0 version—and levels it up. Designed for urban commuters and weekend explorers alike, this upgraded folding eBike is equipped with a powerful 48V 13Ah lithium-ion battery, offering extended range and stronger hill-climbing capability. Its enhanced front fork suspension system and wider 20×4.0 inch fat tires ensure greater comfort and stability on mixed terrain, whether you're cruising city streets or venturing off the beaten path. The BK6S 4.0 also features a refined aluminum alloy frame, Shimano 7-speed gearing, and an intuitive LCD display for real-time ride updates. With greater power, traction, and comfort packed into a foldable design, the BK6S 4.0 is your go-to upgrade for a smarter, stronger ride.

Payment & Security

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  • Front Fork Suspension for Smooth Riding

    Unlike its 3.0 predecessor, the BK6S 4.0 comes equipped with front fork suspension—providing enhanced shock absorption and ride comfort on uneven surfaces, making every trip through the city or countryside more enjoyable.

  • High-Capacity Removable Battery

    The BK6S 4.0 folding electric bike features a 48V 13Ah lithium-ion battery discreetly integrated into the frame. Easily removable after folding, it ensures secure charging and offers up to 90 km of range—perfect for daily commutes and weekend adventures.

  • Multifunctional LCD Display

    Stay informed on every ride with the intuitive LCD screen. Monitor speed, battery level, distance, and assist mode in real-time—essential for efficient and safe riding on your folding electric bike.

  • Integrated Rear Safety Light

    Ride with confidence even after dark thanks to the vivid red rear light. Frame-mounted for extra durability, it offers maximum visibility and safety during nighttime or low-light rides.

  • 20×4.0 Inch Fat Tires for Superior Grip

    Conquer city streets, gravel paths, or wet roads with confidence. The 20×4.0 inch fat tires provide excellent traction, cushioning, and a bold stance—ideal for a versatile all-terrain electric bike.

  • StVZO-Certified Front Headlight

    Ride with confidence after dark thanks to the ultra-bright, StVZO-compliant headlamp. Designed to meet strict German road safety standards, it ensures optimal visibility without dazzling oncoming traffic.

  • Rear Rack & Full Fenders for Practical Comfort

    Designed with practicality in mind, the BK6S 4.0 includes a sturdy rear rack for carrying gear and full-coverage fenders to keep you clean and dry in all weather conditions—making it the ultimate urban e-bike companion.

  • Powerful Motor with Shimano Gearing

    Paired with a Shimano 7-speed transmission, the efficient rear hub motor delivers smooth, responsive power on urban roads or light trails. Whether climbing hills or cruising flat streets, this electric bike adapts to your riding style with precision.

Product comparison

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Facet
BK6S 4.0 Folding Ebike
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KL6S Folding Ebike
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Price
Price
€889,00
€999,00
Battery
Battery
48V 13Ah 624Wh
48V 15.6Ah 748.8Wh
Range
Range
45-90 km
70-120km
Frame
Frame
Aluminum Alloy
Aluminum Alloy
Tires
Tires
20*4.0 inch
20*4 inch Kenda Tires
Suspension
Suspension
Front Fork Suspension
Front Fork Suspension
Brakes
Brakes
Mechanical Brakes
Hydraulic Brakes