SUNNIGOO
SUNNIGOO B4 Folding Electric Bike with Full Suspension | 48V 12.5Ah Fat Tire E-Bike, 250W Motor, 20" All-Terrain Off-Road Commuter Ebike
SUNNIGOO B4 Full Suspension Folding Electric Bike – 20×4.0" Fat Tire Off-Road Commuter E-Bike
Meet the SUNNIGOO B4 full suspension folding electric bike — built for riders who want comfort on cobblestones and capability on trails. This 20×4.0" fat tire e-bike blends daily city commuting with off-road adventures, delivering exceptional stability, cushioning and control on every surface.
Key Features
- High-Capacity Removable Battery – Powered by a 48V 12.5Ah (600Wh) removable lithium battery, the B4 delivers 35–40 km in pure electric mode and 50–80 km in pedal-assist. Charge easily at home or work with the standard EU round plug.
- Smooth & Reliable 250W Power – A 250W motor paired with a Shimano 7-speed gear system gives smooth acceleration and a top speed of 25 km/h, fully compliant with European e-bike regulations.
- Superior All-Terrain Handling – Chaoyang 20×4.0" fat tires and a hydraulic disc brake system deliver maximum grip, safety and reliable stopping power on sand, snow, gravel and city streets.
- Full Suspension & Space-Saving Design – The high-strength aluminum alloy frame features full-suspension elements for a smoother, more comfortable ride, and folds down quickly for storage in car trunks or small spaces.
- Smart LCD Display & Everyday Comfort – Track speed, battery level and mileage on the built-in LCD speedometer, with a rear luggage rack for practical everyday use.
Technical Specifications
| Product Type | Full suspension folding electric bike (off-road commuter) |
| Motor | 250W motor (EU standard) |
| Max. Speed | 25 km/h |
| Battery | 48V 12.5Ah (600Wh) removable lithium-ion |
| Charger | 100–240V, 2A, EU round plug |
| Range – Pure Electric | 35–40 km |
| Range – Pedal Assist | 50–80 km |
| Drivetrain | Shimano 7-speed |
| Tires | Chaoyang 20×4.0" fat tires |
| Brakes | Hydraulic disc brakes |
| Suspension | Full-suspension elements |
| Frame | Aluminum alloy, foldable |
| Display | LCD speedometer |
| Rear Rack | Yes |
| Colors | Black / Military Green |
| Net Weight | 30 kg |
| Gross Weight | 37 kg |
| Package Dimensions | 146 × 28 × 70 cm |
| Packaging | 85% SKD (front wheel unassembled) |
Comfort Is the Point
Most folding electric bikes in this class save money by skipping suspension. The SUNNIGOO B4 doesn't. With full suspension built into the aluminum alloy frame and 4.0-inch fat tires absorbing the bumps, this off-road commuter e-bike keeps you comfortable on cobblestone streets, canal paths and light trails. For riders who want a suspension electric bike without the price tag of a full-suspension mountain e-bike, the B4 is the smart middle ground.
One Bike for Both Worlds
The B4's dual personality is its biggest strength: it's a commuter ebike that handles the daily grind — removable battery, LCD display, rear rack for groceries — and an all-terrain electric bike for weekend escapes. Wide tires and hydraulic disc brakes give you the confidence to switch from tarmac to gravel without missing a beat.
Durable, Foldable, Livable
European city living means space is limited. The B4's foldable electric bicycle frame collapses quickly, so this full-featured fat tire e-bike lives happily in a hallway corner or car boot when not in use — no garage required.
The SUNNIGOO B4 is the full suspension electric bike for riders who refuse to choose between comfort and capability. Backed by SUNNIGOO's European support and fast EU shipping, it's ready for your commute, your weekend, and everything in between.
SUNNIGOO B4 Folding Electric Bike with Full Suspension | 48V 12.5Ah Fat Tire E-Bike, 250W Motor, 20" All-Terrain Off-Road Commuter Ebike
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Disponibile - Pronto per essere spedito
Estimated delivery between settembre 06 and settembre 08. Order within .
🛡️1-Year Frame Warranty & 6-Month Electrical Parts Warranty
🔒 Secure Checkout: VISA, Mastercard, PayPal
💬24/7 Technical Support
1. Power & Gradeability Tests
Performance: Our motors are tested to maintain consistent power output under heavy loads.
Incline Mastery: Each model is verified to conquer inclines, ensuring seamless navigation through underground garages and city overpasses.
2. Battery Endurance & Safety
Real-World Range: We conduct multi-environment range tests. Our high-capacity Lithium-ion batteries are proven to deliver km depending on the riding mode (Pure Electric vs. PAS).
Thermal Management: Batteries are tested for charging efficiency and heat dissipation to prevent overheating and ensure a long lifecycle.
3. All-Terrain & Shock Absorption
Surface Adaptation: whether from 10-inch puncture-resistant tires to 20-inch Chaoyang fat tires, we test grip and stability on wet asphalt, gravel, sand, and snow.
Suspension Rigidity: Our full-suspension and hydraulic systems undergo thousands of compression cycles to guarantee a "smooth-as-silk" ride on uneven urban roads.
4. Safety & Braking Precision
Stopping Power: We equip our vehicles with Dual Braking Systems (Hydraulic Disc or Electronic Brakes). Every batch is tested for immediate stopping distance, even at maximum speeds.
Visibility: Integrated LED lighting and signal systems are vibration-tested to ensure 360° visibility in low-light or high-impact conditions.
5. Structural Integrity & Material Quality
Load-Bearing: Our Aerospace-grade Aluminum Alloy frames and premium silicone pedals are tested for corrosion resistance and anti-slip durability.
Quality Control: With 99% self-developed components, we ensure unparalleled consistency and mechanical reliability across our entire lineup.
Fast Delivery: E-bikes ship from our warehouses in Germany and Italy; e-scooters ship from Germany, Poland and France. Expect your bike to arrive within 3-7 days.
Shipping & Tax: We offer free shipping on most orders. Prices include VAT for EU deliveries.
Official Warranty: Every SUNNIGOO product purchase is protected by an official warranty: 1 year on the frame, 6 months on motor, controller, display and charger, and 3 months on the battery.
Professional Support: Our technical team provides 24/7 online support to assist with assembly, maintenance, or troubleshooting.
Ready to Ride: Arrives in 85-90% SKD packing mode, ensuring the product is nearly ready for use right out of the box with minimal assembly required.
Sustainable Commuting: The SUNNIGOO product is designed to provide a high-performance alternative to fossil-fuel vehicles, helping riders significantly reduce their personal carbon footprint.
Efficient Energy Management: Our high-capacity lithium-ion battery utilizes optimized energy consumption technology to maximize battery life cycle and reduce electronic waste.
Durable Engineering: By using a lightweight aluminum alloy frame and professional-grade components like Shimano and Chaoyang, we create a durable product meant for years of use rather than frequent replacement.
SUNNIGOO B4 Full Suspension Folding Electric Bike – 20×4.0" Fat Tire Off-Road Commuter E-Bike
Meet the SUNNIGOO B4 full suspension folding electric bike — built for riders who want comfort on cobblestones and capability on trails. This 20×4.0" fat tire e-bike blends daily city commuting with off-road adventures, delivering exceptional stability, cushioning and control on every surface.
Key Features
- High-Capacity Removable Battery – Powered by a 48V 12.5Ah (600Wh) removable lithium battery, the B4 delivers 35–40 km in pure electric mode and 50–80 km in pedal-assist. Charge easily at home or work with the standard EU round plug.
- Smooth & Reliable 250W Power – A 250W motor paired with a Shimano 7-speed gear system gives smooth acceleration and a top speed of 25 km/h, fully compliant with European e-bike regulations.
- Superior All-Terrain Handling – Chaoyang 20×4.0" fat tires and a hydraulic disc brake system deliver maximum grip, safety and reliable stopping power on sand, snow, gravel and city streets.
- Full Suspension & Space-Saving Design – The high-strength aluminum alloy frame features full-suspension elements for a smoother, more comfortable ride, and folds down quickly for storage in car trunks or small spaces.
- Smart LCD Display & Everyday Comfort – Track speed, battery level and mileage on the built-in LCD speedometer, with a rear luggage rack for practical everyday use.
Technical Specifications
| Product Type | Full suspension folding electric bike (off-road commuter) |
| Motor | 250W motor (EU standard) |
| Max. Speed | 25 km/h |
| Battery | 48V 12.5Ah (600Wh) removable lithium-ion |
| Charger | 100–240V, 2A, EU round plug |
| Range – Pure Electric | 35–40 km |
| Range – Pedal Assist | 50–80 km |
| Drivetrain | Shimano 7-speed |
| Tires | Chaoyang 20×4.0" fat tires |
| Brakes | Hydraulic disc brakes |
| Suspension | Full-suspension elements |
| Frame | Aluminum alloy, foldable |
| Display | LCD speedometer |
| Rear Rack | Yes |
| Colors | Black / Military Green |
| Net Weight | 30 kg |
| Gross Weight | 37 kg |
| Package Dimensions | 146 × 28 × 70 cm |
| Packaging | 85% SKD (front wheel unassembled) |
Comfort Is the Point
Most folding electric bikes in this class save money by skipping suspension. The SUNNIGOO B4 doesn't. With full suspension built into the aluminum alloy frame and 4.0-inch fat tires absorbing the bumps, this off-road commuter e-bike keeps you comfortable on cobblestone streets, canal paths and light trails. For riders who want a suspension electric bike without the price tag of a full-suspension mountain e-bike, the B4 is the smart middle ground.
One Bike for Both Worlds
The B4's dual personality is its biggest strength: it's a commuter ebike that handles the daily grind — removable battery, LCD display, rear rack for groceries — and an all-terrain electric bike for weekend escapes. Wide tires and hydraulic disc brakes give you the confidence to switch from tarmac to gravel without missing a beat.
Durable, Foldable, Livable
European city living means space is limited. The B4's foldable electric bicycle frame collapses quickly, so this full-featured fat tire e-bike lives happily in a hallway corner or car boot when not in use — no garage required.
The SUNNIGOO B4 is the full suspension electric bike for riders who refuse to choose between comfort and capability. Backed by SUNNIGOO's European support and fast EU shipping, it's ready for your commute, your weekend, and everything in between.
Frequently Asked Questions
Shipping & Delivery
E-bikes ship from our warehouses in Germany and Italy; e-scooters ship from Germany, Poland and France. Every order is dispatched from within the EU, so there is no long ocean-freight wait, no surprise customs clearance, and delivery is faster and more predictable.
Most EU orders arrive within 3–7 business days from dispatch. You’ll receive a confirmation email with your tracking number as soon as your bike leaves the warehouse.
Yes. Once your order is dispatched, we send you a tracking link by email so you can follow your bike from our warehouse to your door in real time.
Your bike arrives in a compact box, 85–90% pre-assembled. You only need to attach the front wheel, handlebar and pedals — typically 20–30 minutes with the included tools and illustrated guide.
Payment & Orders
We accept Visa, Mastercard and PayPal through our secure checkout. All transactions are encrypted and processed through Shopify’s certified payment gateway.
Absolutely. Our checkout is SSL-encrypted and your card details are never stored on our servers — they go directly to our certified payment provider.
If your order hasn’t shipped yet, we’re happy to change or cancel it — just contact our support team with your order number. Once dispatched, the order can be returned under our standard policy.
Yes. We support dropshipping, wholesale and OEM/ODM partnerships with tiered pricing. Contact our team for a tailored quote.
Warranty & Support
Please contact our 24/7 support team with photos of the issue and your order number. We’ll send replacement parts or arrange a resolution as quickly as possible — no long forms, no runaround.
Every SUNNIGOO bike includes a 1-year frame warranty, 6-month cover for the motor, controller, display and charger, and a 3-month battery warranty. Tyres, brake pads and saddles are not covered by warranty, but we replace them free of charge in case of factory defects. See our Warranty Policy for full details.
Contact our support team with your order number, a short description and photos (or a short video) of the issue. We’ll assess it within 24–48 hours and ship the necessary parts or arrange a repair. The full claim process is explained on our Warranty & Support page.
Yes. Under EU consumer law you have a 14-day right of withdrawal from delivery. As long as the bike is unused and in its original packaging, we’ll refund the full purchase price once we receive it.
About Your SUNNIGOO
Yes. SUNNIGOO e-bikes sold in the EU are engineered to comply with European e-bike regulations, including the CE EN15194 standard, with pedal-assist up to 25 km/h — legal on European roads and bike paths without registration or a licence. Check your model’s specifications for its exact motor rating.
Range varies by model — many of our e-bikes deliver up to 120 km on a single charge in eco mode, measured with a rider around 75 kg on flat terrain. Real-world range depends on your weight, terrain, assist level and weather. Check the specifications of your model for its exact range.
Yes — the battery is fully removable, so you can lock the frame outside and charge the battery indoors at home or at the office.
Very little. Keep the tyres inflated, the brake pads adjusted and the chain lubricated, and your e-bike will stay reliable for years. If anything needs attention, our support team is available 24/7.