Electric bikeFat tyreFolding

F20 250W Folding Electric Bike for Adults, 20" Fat Tyre eBike, 36V 16Ah Battery, Upto 25 km/h, Up to 75 km Range, Shimano 7-Speed - Gray

  • 250W motor
  • 576Wh battery
  • 75 km range
  • 20″ fat tyre
£499.00

Colour: Gray

  • Free UK deliveryEstimated 3–7 business days after dispatch
  • Dispatched in 1–2 business daysTracking number sent by email
  • ReturnsUnused and boxed — see our Refund Policy

Listed at 250W, assist to 25 km/h — within the UK EAPC power and speed limits, so no licence, tax or insurance is needed to ride it on the road (riders must be 14+). GOV.UK e-bike rules

Questions about this bike? +44 7216 788723 · support@kolmaax.site

Spec dashboard

The numbers, at a glance

Read from the listing. Ranges are the manufacturer's stated figures: hills, wind, cold and higher assist levels shorten them.

Motor250Wrated power
Battery576Wh36V × 16Ah (calculated)
Range75kmmanufacturer stated
Assist to25km/h≈ 15.5 mph
Wheels20″fat tyre

250W Rear Hub Motor for Daily Riding

The F20 electric bike is equipped with a 250W rear hub brushless motor that supports pedal-assisted riding up to 25 km/h. The motor provides assistance for commuting, leisure rides, and journeys on mixed terrain while complying with UK and EU e-bike regulations.

36V 18Ah Removable Lithium Battery

The bike features a removable 36V 18Ah lithium-ion battery with a total capacity of 648Wh. The battery can be removed for charging separately from the bike and supports extended riding distances on a single charge. Charging time is approximately 8 hours using the supplied charger.

Folding Frame Design

The aluminium alloy frame incorporates a folding mechanism that allows the bike to be stored in smaller spaces and transported more conveniently. The foldable design is suitable for users who need to carry the bike in vehicles or store it indoors.

20 x 3.0 Inch Fat Tyres

The 20 x 3.0-inch tyres provide increased contact with the ground compared to standard bicycle tyres. The wider tyre profile helps maintain stability and traction on a variety of surfaces including:

• Paved roads
• Gravel paths
• Park trails
• Compact dirt tracks
• Urban streets

Front Suspension Fork

A front suspension fork helps absorb vibrations and impacts from uneven road surfaces. This contributes to riding comfort during longer journeys and on rougher terrain.

Shimano 7-Speed Gear System

The Shimano 7-speed drivetrain allows riders to select different gears according to riding conditions. The gear range supports climbing, cruising, and adapting to varying road gradients.

Mechanical Disc Braking System

Front and rear mechanical disc brakes provide braking performance in a range of weather and road conditions. The braking system is designed to deliver controlled stopping for daily riding.

LCD Display

An integrated LCD display provides riding information including:

• Current speed
• Battery level
• Pedal assist level
• Distance information
• System status

Integrated Lighting System

The F20 includes front and rear lights to improve visibility during low-light riding conditions and help riders remain visible to other road users.

Rear Cargo Rack

A rear rack is included for carrying compatible bags, small cargo, and commuting essentials.

Certified for European Standards

The F20 is manufactured in accordance with EN15194 requirements and carries CE certification for applicable markets.

Product Specifications

• Bike Type: Folding Electric Bike
• Frame Material: Aluminium Alloy
• Motor: 250W Rear Hub Brushless Motor
• Torque: 40Nm
• Battery: 36V 18Ah Removable Lithium-Ion Battery
• Battery Capacity: 648Wh
• Battery Cells: 21700 Lithium Cells
• Maximum Assisted Speed: 25 km/h
• Estimated Range: Up to 60–80 km per Charge
• Transmission: Shimano 7-Speed
• Suspension: Front Fork Suspension
• Brake Type: Mechanical Disc Brakes
• Display: LCD Display
• Wheel Size: 20 Inches
• Tyre Size: 20 x 3.0 Inches
• Lighting: Front and Rear Lights
• Water Resistance: IP54
• Maximum Rider Load: 140 kg
• Recommended Rider Height: 160–198 cm
• Bike Weight: Approximately 26 kg
• Battery Weight: Approximately 3.8 kg
• Charging Time: Approximately 8 Hours
• Certifications: CE, EN15194, E-Mark

Dimensions

• Unfolded Size: 174 x 60 x 118 cm
• Folded Size: 88 x 38 x 70 cm

Package Includes

• 1 × F20 Folding Electric Bike
• 1 × 36V 18Ah Battery
• 1 × Battery Charger
• 1 × Tool Kit
• 2 × Pedals
• 1 × User Manual

Orders are processed within 1–2 business days (Monday to Friday); orders placed at weekends or on public holidays are processed the next business day. Estimated delivery is 3–7 business days within the United Kingdom.

Standard shipping is free on all orders, with no additional shipping fees at checkout.

Once your order ships you'll receive a confirmation email with a tracking number. Read the full Shipping Policy.

To start a return, email support@kolmaax.site with your full name, order number and reason for return (with photos if the item is damaged, defective or incorrect). Items must be unused, in their original packaging and complete with all accessories and parts.

If an item arrives damaged, defective or incorrect, contact us within 48 hours of delivery. Read the full Refund Policy.