KOOLUX BK6S 4.0 Folding Electric Bike - Fold Fast. Ride Free.

The KOOLUX BK6S 4.0 Folding Electric Bike is engineered for riders who want the perfect blend of performance, durability, and portability. Whether you're commuting through the city, exploring off-road trails, or simply enjoying weekend adventures, the BK6S delivers a smooth, reliable, and enjoyable riding experience. With its robust construction, long-lasting battery, and fat-tire capability, this folding e-bike is built to adapt to every terrain and every lifestyle.

At the heart of the KOOLUX BK6S 4.0 is a 48V 13Ah (624Wh) lithium-ion power battery that ensures both endurance and reliability. This high-capacity battery provides an impressive riding range of 45 to 90 kilometers, depending on terrain, riding style, and assistance level. Whether you prefer leisurely rides or long-distance trips, the BK6S gives you the confidence to travel without worrying about frequent recharging. When it’s time to power up, the included 54.6V 2.0A charger replenishes the battery within 6–7 hours, making it ideal for overnight charging or quick top-ups between trips.

Despite its power, the KOOLUX BK6S 4.0 bike remains exceptionally convenient thanks to its foldable aluminum alloy frame. Designed for strength and lightweight maneuverability, the BK6S folds down to a compact 93 × 55 × 76 cm, making it easy to store in apartments, car trunks, offices, or small garages. When unfolded, it expands to 182 × 60 × 110 cm, offering a full-sized ride without sacrificing portability. The overall bike weight of 33.2 kg (net) ensures stability on rugged terrain while remaining manageable when folded.

The KOOLUX BK6S 4.0 prioritizes rider comfort and control. Equipped with 20 × 4.0-inch fat tires, the bike effortlessly handles uneven roads, gravel paths, sand, snow, and urban terrain. Combined with its front fork suspension, the BK6S smooths out bumps and vibrations, allowing for a more comfortable and controlled ride.

The mechanical braking system provides dependable stopping power in various weather and riding conditions, enhancing your safety on every journey. For added versatility, the Shimano 7-speed gearing system allows riders to effortlessly switch between gears, making uphill climbs, downhill descents, and flat-surface cruising easier and more efficient.

Built with a 120-kg load capacity, the KOOLUX BK6S 4.0 accommodates a wide range of riders and cargo. Its standard speed of 25 km/h complies with many road-safety regulations, making it suitable for commuting and daily use. Additionally, the bike can tackle inclines up to 25°, ensuring you can navigate hills or challenging terrain with confidence. The IP54 waterproof level adds peace of mind by protecting the bike from splashes, dust, and light rain—perfect for unpredictable weather.

From daily commuting to weekend exploration, the KOOLUX BK6S is designed to adapt to your lifestyle. Its combination of rugged features and foldable convenience makes it suitable for riders seeking freedom, flexibility, and performance.

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,

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.

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