The KOOLUX BK10S

Discover the KOOLUX BK10S Electric Bike, a folding fat-tire e-bike engineered for city streets and beyond. Offering up to 120 km of range, an unlockable 38 km/h top speed, and a durable yet portable design, it’s perfect for riders who want a versatile and stylish companion for daily commutes and weekend adventures.

KOOLUX

KOOLUX began when three young cycling enthusiasts took on a challenging 38-mile mountainous ride and found themselves walking their bikes up steep terrain in the dark, cold and exhausted. Determined to solve that struggle, they set out to design electric bikes to help riders keep going. After winning recognition in a campus tech competition, they formally founded the company under the name “KOOLUX” five years later. Today, the brand is known for bringing stylish, powerful, and accessible e-mobility solutions to riders around the world.  

Specifications

General Details
  • Brand: KOOLUX
  • Model: BK10S
  • Type: Folding Electric Fat-Tire Bike
  • Frame Material: Aluminum Alloy
  • Colour: Black
  • Wheel Type: Integrated Wheel
  • Drive Mode: Pedal Assist + Pure Electric
Performance & Battery
  • Motor Power: 250W rated brushless hub motor (0.25 kW), ~400 rpm idle speed
  • Battery Type: 18650 lithium-ion power pack
  • Battery Capacity: 48V 15.6Ah (≈748.8Wh), removable
  • Charger Input: 100–240V, 50/60Hz, 3.0A
  • Charger Output: 54.6V / 3.0A
  • Charging Time: 7–8 hours
  • Protections: Undervoltage 40.5V • Overcurrent 21A ± 1A
Speed & Motor
  • Top Speed: 25 km/h (15.5 mph) road-legal • Unlockable 38 km/h (23.6 mph) for private use
  • Climbing Ability: Up to 25° inclines
Dimensions & Weight
  • Unfolded Size: 1780 × 790 × 1118 mm (70.1 × 31.1 × 44.0 in)
  • Folded Size: 960 × 470 × 890 mm (37.8 × 18.5 × 35.0 in)
  • Package Size: 1450 × 280 × 790 mm (57.1 × 11.0 × 31.1 in)
  • Net Weight: 30.5 kg (67.2 lbs)
  • Gross Weight: 36 kg (79.4 lbs)
Load & Climbing
  • Max Load Capacity: 120 kg (265 lbs)
  • Max Climb Angle: 25°
Tires, Brakes & Waterproofing
  • Tires: 20 × 4.0 in pneumatic fat tires (AV valve)
  • Brakes: Front & rear disc brakes
  • Suspension: Shock-absorbing front suspension fork
  • Water Resistance: IP54 (splash & dust resistant)
More Features
  • Display: Multifunction LCD display (speed, distance, battery, assist mode)
  • Gearing: Shimano 7-speed transmission
  • Assist Modes: Pedal assist + pure electric throttle mode

  • Front Light: LED headlight
  • Rear Light: Reflector (optional tail light compatible)
  • Built-in Protections: Overcurrent + undervoltage safety system

  • Foldable frame for portability
  • Integrated wheel design for strength and style
  • Shimano 7-speed gearing for varied terrain
  • All-terrain fat tires for stability and comfort

Full Description

The KOOLUX BK10S Electric Bike is built for riders who want the perfect mix of everyday practicality and all-terrain versatility. With its 250W brushless hub motor and 48V 15.6Ah lithium-ion battery, it offers a reliable range of 70–120 km depending on riding conditions, making it ideal for commutes, weekend rides, or light trail adventures. The foldable aluminum frame and integrated wheel design make it compact and durable, while the Shimano 7-speed transmission ensures flexibility across city streets and off-road paths.

Equipped with 20 × 4.0-inch fat tiresfront suspension fork, and front and rear disc brakes, the BK10S delivers both comfort and control. The multifunction LCD display keeps you informed of speed, distance, and battery status, while the integrated LED headlight provides visibility at night. With its IP54 water resistance, foldable portability, and powerful ride performance, the BK10S is an all-rounder designed for everyday riders who want more freedom on two wheels.

What's in the Box?

  • Koolux BK10S - 500 W

    KOOLUX BK10S

  • Charger

  • Tool Kit

  • User Manual

Free shipping and returns

FAQs

Delivery

2–4 days standard shipping. Need it sooner? Express shipping is available at checkout.

Warranty

Includes a 2-year warranty. Any issues? Just head over to our Warranties page

Payments

We accept all major payment methods—credit & debit cards, PayPal, and more.

Returns

Easy 30-day returns from delivery—just send it back in its original condition for a refund or exchange.

Legal Use Disclaimer

Electric scooters and e-bikes are subject to local laws and regulations, which vary by country, region, and city. Before purchasing or operating this product, it is the customer’s responsibility to check and comply with all applicable road, traffic, and safety regulations in their area.

This product may be restricted to private property use only in some locations. The seller accepts no responsibility for misuse or use that violates local laws. Always wear appropriate safety gear and ride responsibly.

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