Whirlwind C4 Electric Foldable 250W Bike Review

What is the Whirlwind C4 Electric Folding Bike?

The C4 foldable electric bike makes travel easier, whether that be commuting to and from work or simple for leisure, while also helping the environment. It automatically assists the user when pedaling, the level of assistance depends on the gear chosen (3 gear options), with a max speed of 15.5 mph.

wWhirlwind C4 Electric Foldable Bike Review

The LED screen shows your speed, distance traveled, gear level and battery capacity. Simple and easy to fold so you can easily transport the bike and the lightweight frame makes it easy to carry (Folded size: 71 x 40 x 63cm). Full size: 124 x 54 x 103cm. Max load: 110kg. Weight: 16kg. Endurance mileage: 35 miles. Charge time: 3-4 hours. Power: 250W. Climbing capacity: 15 degrees.

The C4 for commuting:

The C4 electric bicycle is the perfect way to let mechanical assistance help you get out and about. The bike automatically assists the user when pedaling by providing assistance in proportion to the gear selected (three options are available). An LED display shows your speed, distance travelled, gear level and battery capacity. The frame of the bicycle is lightweight yet sturdy for maximum durability, making it easier for you to transport and carry when needed (folded size: 71 x 40 x 63 cm).

C4 Whirlwind Folding Bike for Road Riding

The Whirlwind C4 Electric Bike is perfect for keeping yourself active and helping the environment. It has a LED computer display to keep you updated with your speed, distance travelled, gear level and battery capacity and helps you maximise efficiency when exploring new areas or simply commuting to work on the road. This electric bike can reach speeds of up to 15.5 mph with the pedal assist and supports a maximum load of 110kg, its three different gear levels allow for different intensities of assistance.

Whirlwind C4 Electric Folding Bike Review
Whirlwind C4 Electric Folding Bike Review

Travel to Work on the C4 Whirlwind

The C4 electric bike makes travel easier, whether travelling for work or for leisure. The electric bike pedal assist function automatically assists the user whilst pedalling, which can greatly reduce your effort to travel and make cycling a more enjoyable experience. With easy to use LED display showing your speed, distance travelled, gear level and battery capacity, you have the information you need at your fingertips. The simple one-button fold makes transportation and storage easy – simply fold it up when storing in your garage or car boot, or fold it up when carrying on the train or in a taxi.

C4 Whirlwind Electric Bike
C4 Whirlwind Electric Bike

Don’t spend ages waiting in traffic on your way to work, or get sweaty and tired cycling around your local area. The lightweight and compact Whirlwind C4 electric folding bike solves these issues, making travel a breeze.

Whirlwind C4 Folding Electric Bike Specifications:

  • Bike Name: Whirlwind C4 Electric Folding Bike
  • Age Range: 16-Adult
  • Bike Type: Cheap Folding Electric Bike
  • Colour Options: Matt Black or White
  • Brake Type: Duel Disc Brake
  • Dimensions: ‎103cm (H) X 54cm (D) X 124cm (L)
  • Folded Dimensions: 71cm (H) x 63cm (D) x 41 cm (L)
  • Assembly Requirements: Comes Assembled Folded in a Box
  • Suspension Type: Rigid – No Suspension
  • Wheel Size: 14″
  • Battery Included: Yes
  • Battery Type: Lithium Ion Battery
  • Package Dimensions: ‎71 x 63 x 41 cm; 16 Kg
  • Brand: Whirlwind
  • Manufacturer Reference Number: 6003161
  • Amazon Asin: B07YCQ7GGQ
  • Bike Usage: Road and Trail

Key Features

1. Powerful 250W Motor

The heart of the Whirlwind C4 is its robust 250W motor, offering a remarkable blend of power and efficiency. Whether you’re navigating city streets or tackling hilly terrains, this motor ensures a smooth and effortless ride.

2. Lightweight Design

One standout feature of the Whirlwind C4 is its lightweight construction. Weighing in at just 32 pounds, this electric bike is remarkably portable, making it a fantastic option for commuters. The lightweight frame is constructed from high-quality materials, ensuring both durability and agility.

3. Long-Lasting Battery

Equipped with a high-capacity lithium-ion battery, the Whirlwind C4 offers a substantial range. Riders can enjoy extended journeys without the worry of running out of power. The battery charges quickly and efficiently, making it ready for your next adventure in no time.

4. Premium Build Quality

FattErad Bikes have left no stone unturned in crafting a premium electric bike. The Whirlwind C4 boasts a well-constructed frame, reliable components, and meticulous attention to detail. This quality is evident in the bike’s overall durability and performance.


The performance of the Whirlwind C4 is truly remarkable. With its 250W motor and lightweight design, it offers excellent acceleration and handling. The electric bike effortlessly tackles inclines, and its responsive brakes ensure a safe and controlled ride. Riders can choose from multiple assist levels, allowing for a customizable riding experience.

Design and Comfort

The Whirlwind C4 is not only about performance but also aesthetics and comfort. Its ergonomic design ensures a comfortable riding posture, even during long journeys. The saddle is well-padded, and the handlebars are designed for a natural grip. The bike’s sleek and modern design adds a touch of elegance to your ride.

Value for Money

When it comes to electric bikes, finding a balance between quality and affordability can be challenging. The Whirlwind C4 excels in this regard. Its competitive price point, combined with the high-end features it offers, makes it a great investment. You get a top-notch electric bike without breaking the bank.

Pro’s of the Whirlwind C4 Folding Bike:

  • Comes in both Black and White
  • Easy folding mechanism
  • Comes already assembled
  • A great easy to use bike, smooth to ride
  • Speedy bike – even on hills this bike is fast!

Con’s of the Whirlwind C4 Folding Bike:

  • Fixed gear – Although you can vary the pedal assistance
  • Not as light as some more expensive electric folding bikes
  • The Mud Guard is fiddly to fit
  • The saddle it comes with is not the most comfortable

Target Rider:

The Whirlwind C4 Electric Foldable Bike is designed for commuters and urban riders seeking a lightweight, foldable electric bike for convenient transportation.

Customer Reviews of the Whirlwind C4 Electric 250w Foldable Bike :

Customer reviews highlight positive experiences with the Whirlwind C4 after two months of ownership. Riders appreciate its lightweight design, ease of use, and foldability, making it a practical choice for daily commuting.

Fat Tread Bikes Editor’s Review:

Editor John Dean, with 20 years of bike expertise, praises the Whirlwind C4 for its quality build, emphasizing its suitability for urban environments. He notes its ease of maintenance and customer support, aligning it with the needs of both beginners and experienced riders.

Pros and Cons:


  • Lightweight (16kg)
  • Foldable frame
  • Front light for commuting
  • Removable battery
  • Street legal in the UK


  • Limited assist range (9-18 miles)
  • No rear light for commuting

Street Legality (UK):

Yes, the Whirlwind C4 is street legal in the UK, meeting the criteria for electrically assisted pedal cycles with a maximum power output of 250 watts and a speed assistance limit of 15.5mph.

Comparison Table:

SpecificationWhirlwind C4Other Budget Folding Electric Bikes
Frame MaterialAluminiumAluminium
Motor PositionRearRear
Transmission TypeDerailleur3-speed Derailleur
Battery Capacity187Wh187Wh
Assist Range9-18 milesUp to 35 miles
Front/Rear BrakeDisc BrakeFront and Rear Disc Brake

Review Rating (Out of 100):

  • Quality: 8
  • Weight: 9
  • Ease of Build: 9
  • Price: 7
  • Ease of Maintenance: 8
  • Components: 8
  • Ease of Riding: 8
  • Customer Support: 9
  • Motor Power: 8

Review Summary:

The Whirlwind C4 Electric Foldable Bike earns a commendable rating of 74 out of 100. Its lightweight design, ease of use, and positive customer experiences contribute to its overall appeal for urban commuting. While its assist range is modest, the bike’s street legality and reliability make it a solid choice for riders seeking convenience and efficiency in city travel.

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