KOOLUX BK6S 4.0
KOOLUX BK6S 4.0
Foldable Electric Fat Bike – City & Trails
The KOOLUX BK6S 4.0 is a foldable electric fat bike designed for urban commuting and mixed terrains. An evolution of the BK6S 3.0, it features a 48V 13Ah battery, improved stability thanks to its 20 × 4.0 inch wide tires, and enhanced comfort for daily use. Compact when folded, it remains practical to transport and store.
- Motor: powerful rear hub motor (EU compliant assistance – 25 km/h)
- Battery: 48 V / 13 Ah lithium-ion
- Range: up to 90 km depending on usage conditions
- Transmission: Shimano 7 speeds
- Brakes: front and rear disc brakes for progressive braking
- Frame: robust and foldable aluminum alloy
- Suspension: suspended front fork
- Tires: 20 × 4.0 inch fat tires (enhanced grip and stability)
- Max load: 120 kg
- Charging time: 6 to 7 hours
- Lighting: StVZO certified front light + integrated rear light
- Included equipment: rear rack and full fenders
- Protection rating: IP54 (splash and dust resistant)
Thanks to its 4.0 fat bike tires and suspended fork, the KOOLUX BK6S 4.0 effectively absorbs road imperfections. It offers a more stable and safer ride, both in the city and on trails.
The KOOLUX BK6S 4.0 48V foldable electric bike is an excellent compromise between power, range, and practicality. Ideal for daily commutes as well as rides on varied terrains, it combines performance and ease of transport. Helmet and protective gear recommended.
Page vérifiée par Avis Certifiés
Vélo super stable avec une autonomie impressionnante. Le pliage est rapide et pratique pour le transport.
Très bon rapport qualité/prix. La suspension avant améliore vraiment le confort sur routes irrégulières.
Très satisfait de ce vélo. Bonne puissance et autonomie correcte pour mes trajets quotidiens.
Conduite très agréable et stable grâce aux pneus larges. Idéal pour la ville et les balades.
Bon vélo globalement. Le poids est un peu élevé mais la qualité de fabrication est au rendez-vous.
Livraison rapide et montage simple. L’assistance électrique est fluide et agréable.
Vélo robuste et confortable. Je l’utilise tous les jours pour aller au travail.
Très bon achat. Le moteur aide bien dans les montées et la conduite reste stable.
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Technical Specifications
Technical Specifications
Technical specifications of the KOOLUX BK6S 4.0
| Model | KOOLUX BK6S 4.0 |
| Type | Foldable electric bike |
| Frame | Reinforced aluminum alloy, foldable |
| Motor | Powerful rear hub motor (EU standard compliant) |
| Max speed | 25 km/h (limited, EU compliant) |
| Battery | Lithium-ion 48 V / 13 Ah (removable) |
| Range | Up to 90 km (depending on usage) |
| Charging time | Approximately 6 to 7 hours |
| Transmission | Shimano 7 speeds |
| Brakes | Front and rear disc brakes |
| Suspension | Suspended front fork |
| Tires | 20 × 4.0 inches (fat tires) |
| Max load | 120 kg |
| Weight | ≈ 33 kg |
| Protection rating | IP54 |
| Certification | CE |
| Warranty | 2 years |
Dimensions
Dimensions
What are the dimensions of the KOOLUX BK6S 4.0?
| Dimensions (unfolded) | ≈ 175 × 60 × 110 cm |
| Dimensions (folded) | ≈ 95 × 50 × 75 cm |
| Wheel size | 20 × 4.0 inches |
| Saddle height | Adjustable (≈ 80 to 105 cm) |
| Handlebar width | ≈ 60 cm |
| Bike weight | ≈ 33 kg |
Box contents
Box contents
What's in the box?
| Included items | Details |
| Foldable electric bike | KOOLUX BK6S 4.0, pre-assembled (~90%) |
| Battery | Removable 48V Lithium-ion |
| Charger | 220V AC charger – EU plug |
| Keys | 2 keys for battery lock |
| Tool kit | Basic tools for assembly and adjustments |
| User manual | Multilingual manual |
| Bell | Included |
| Pedals | Foldable pedals (depending on configuration) |
| Mudguards | Front and rear |
| Kickstand | Side kickstand |
FAQ
FAQ
BK6S 4.0 FAQ: All Frequently Asked Questions
| Question | Answer |
| What is the real-world range of the BK6S 4.0? | Up to 90 km depending on the assistance mode and terrain. In the city, about 60‑80 km. |
| How long does it take to charge the battery? | About 6‑7 hours with the provided charger. |
| Is the bike foldable and easy to transport? | Yes, folded dimensions ≈ 95 × 50 × 75 cm. Weight ≈ 33 kg. |
| Are the tires suitable for all types of terrain? | Yes, wide 20×4.0 inch tires suitable for roads, gravel paths, and slightly uneven terrain. |
| Is the bike CE certified? | Yes, the BK6S 4.0 is CE certified and complies with European standards. |
| What accessories are included? | Removable battery, charger, folding pedals, mudguards, kickstand, bell, tool kit, and user manual. |
| What warranty is offered? | 2-year manufacturer's warranty on the frame and main components. |
| Can the bike be used in the rain? | Yes, IP54 rating. Avoid complete immersion or extreme conditions. |
| Is it suitable for commuting? | Yes, designed for daily urban commuting, with comfort, suspension, and a suitable battery. |
| How do I maintain the BK6S 4.0? | Clean with a damp cloth, check brakes and tire pressure, charge the battery after prolonged use. Do not immerse in water. |
