Fiido C21 E-Gravel E-Bike for Urban and Gravel Riding

Lightweight assistance for city streets and gravel routes

The Fiido C21 combines a slim aluminium frame with torque-sensing pedal assistance. Its 250W rear hub motor responds to your effort, while nine-speed gearing helps you choose a comfortable cadence on urban journeys and lighter gravel routes.

At approximately 17.5kg, the C21 keeps the feel of a conventional bicycle. Hydraulic disc brakes, 700c tyres and an integrated 208.8Wh battery complete a practical package for riders who value a lighter e-bike.

Important UK use notice For UK EAPC use, retain working pedals, a motor rated at no more than 250W continuous power and assistance limited to 15.5mph (25km/h). Riders must be 14 or over. Keep the supplied system unmodified. Read the UK electric bike rules. Real-world range Up to 100km per charge. Actual range varies with assistance level, rider and luggage weight, hills, wind, temperature, tyre pressure and battery condition.

Designed for everyday riding

• Responsive assistance: a torque sensor adjusts support to how firmly you pedal.
• Lighter handling: the approximately 17.5kg build is easier to manoeuvre than heavier touring models.
• Flexible gearing: nine speeds help you adapt your pedalling to climbs and flatter sections.
• Clean frame design: the integrated battery keeps the bike’s profile uncluttered.

Fiido C21 Technical Specifications

Motor	250W rear hub motor
Top Assisted Speed	25 km/h (15.5 mph)
Sensor	Torque sensor pedal assist
Battery	36V 5.8Ah / 208.8Wh integrated lithium battery
Range	Up to 100km per charge
Frame	Aluminium alloy
Tyres	700c gravel tyres
Brakes	TEKTRO hydraulic disc brakes
Drivetrain	L-TWOO 9-speed
Weight	Approx. 17.5 kg
Max Load	Approx. 120 kg

Frequently Asked Questions

Who is the C21 best suited to?

Riders looking for a relatively light e-bike for commuting, leisure rides and lighter gravel routes. Its conventional frame and 700c wheels suit people who do not need a folding or cargo bike.

How does the assistance respond?

The torque sensor measures your pedalling effort and adjusts motor support as you ride. The nine-speed drivetrain lets you change your own gearing independently.

Is the battery integrated into the frame?

Yes. The C21 uses a 36V 5.8Ah battery integrated into the frame, with a capacity of 208.8Wh.

How can I get the most range from the C21?

Use lower assistance on easier sections, keep tyres at the correct pressure and maintain a steady pace. Hills, cold weather and heavier loads use more battery power.

Delivery, returns and support

UK-wide delivery with specialist product guidance and after-sales support.

Explore our electric bike range or view our repairs and servicing.

Before ordering: Delivery information, returns & refunds, and warranty & support.

Fiido C21 video