Fiido C21 – Versatile E-Bike for City & Gravel, Lightweight with Torque Sensor

The Fiido C21 is a lightweight, versatile electric bike designed for both city commuting and adventure, with a 250W motor, 100 km range, and a 17.5 kg frame. It features a torque sensor for smooth pedal-assist and hydraulic disc brakes for powerful stopping.

Target Users / Use Cases of the Fiido C21 Electric Bike

• Urban commuters looking for a light, compact bike that offers efficient, long-range travel.

• Adventure riders who need a reliable e-bike for gravel roads and varied terrains.

• Daily riders covering distances of 5–50 km (3–31 miles), requiring a bike with smooth power delivery and easy storage.

• Cyclists who value convenience, comfort, and durability for everyday urban travel or weekend adventures.

Key Benefits of the Fiido C21 E-Bike

• 17.5 kg: Lightweight and easy to carry, ideal for urban commuters and those with limited storage space.

• Mivice Torque Sensor: Premium pedal assist for a natural, smooth ride.

• 100 km Range: Long range on a single charge, perfect for daily commutes or weekend trips.

• Hydraulic Brakes: Reliable, quick stopping power for safety in any condition.

• Low-Resistance Motor: Silent motor operation, delivering smooth and efficient power.

• 9-Speed Gears: 9-speed system for better control and smooth riding on various terrains.

Basic Specifications of the Fiido C21

Detailed Technical Specifications of the Fiido C21 E-Bike

Frame and Fork

• Frame: 700C aluminum alloy urban gravel frame

• Fork: Aluminum alloy thru-axle fork (15mm axle diameter)

• Headset: Aluminum alloy bearing headset

E-System

• Drive Unit: Mivice M080 250W brushless motor

• Battery: DMEGC 208.8Wh

• Charger: 36V2A

• Display: 2.4-inch LCD

• Sensor: Mivice torque sensor S200

Drivetrain

• Rear Derailleur: L-TWOO RD-5009-M

• Shifters: L-TWOO SL-5009-9S

• Chain: KMC X9

• Crank: Aluminum alloy 52T

• Rear Cogs: L-TWOO 9S (11-32T)

Brakes

• Brakes: TEKTRO HD-M275 hydraulic disc brakes

• Brake Levers: TEKTRO HD-M275

Wheels & Tires

• Front Hub: Aluminum alloy double-bearing barrel axle hub (15mm axle diameter)

• Rims: Aluminum alloy double-layer rims

• Tires: CST/KENDA 700C x 1.57, puncture-proof

Components

• Handlebar: Aluminum alloy (640mm length, 31.8mm max diameter, 22.2mm min diameter)

• Stem: Aluminum alloy stem

• Grips: TPR non-slip handle grips (130mm length)

• Saddle: VELO vacuum full-fit saddle

• Seatpost: Aluminum alloy clamp head seatpost (300mm M-size, 350mm L-size)

In-Depth Product Description of the Fiido C21 E-Bike

Sleek. Light. Ready to Go.
The Fiido C21 City E-Bike is designed for those who want a powerful e-bike that’s easy to carry and store. Weighing just 17.5 kg, it's ideal for both urban commuting and light adventure cycling.

Smooth Power All the Way
Powered by the Mivice torque sensor, the C21 offers smooth, responsive pedal assist. The low-resistance motor ensures a quiet, efficient ride, providing up to 100 km of range on a single charge.

Confidence Across Terrains
Equipped with 700C puncture-proof knobby tires and TEKTRO hydraulic brakes, the C21 delivers stability and control across urban streets or gravel paths. The 9-speed system offers precise gear control for tackling inclines or rough roads.

Designed Around Your Security & Convenience
The HD color display is easy to read, rain or shine, and the IP54 waterproof rating keeps your bike protected. With fully integrated wiring, maintenance is easy, and you’ll have a clean, sleek look.

Featherweight Frame, Full Freedom
At just 17.5 kg, this bike is easy to lift, store, and take wherever life leads you. The step-thru frame and adjustable components make it perfect for a wide range of riders, from 160 cm to 205 cm in height.

Tough Tires, Smooth Grip
The CST/KENDA puncture-proof tires provide a smooth ride and are built to handle rough paths, giving you confidence wherever you go.

Real-World Range Testing

Eco Mode: 100 km
Normal Mode: 58.74 km
Sport Mode: 50.57 km
Turbo Mode: 44.55 km
Turbo+ Mode: 34.51 km

Frequently Asked Questions (FAQ)

1. What is the range of the Fiido C21?
The Fiido C21 offers a maximum range of up to 100 km, depending on the selected riding mode (Eco, Normal, Sport, Turbo) and terrain.

2. Does the Fiido C21 have a torque sensor?
Yes, the Fiido C21 is equipped with a Mivice torque sensor for smooth and efficient pedal assist.

3. What is the recommended rider height for the Fiido C21?
The Fiido C21 is suitable for riders between 160 cm and 205 cm, with adjustable components for a customizable fit.

4. Is the Fiido C21 waterproof?
Yes, the Fiido C21 has an IP54 waterproof rating, meaning it’s resistant to rain and dust, allowing you to ride in various weather conditions.

5. What is the charging time for the Fiido C21?
The Fiido C21 lightweight e-bike  can be fully charged in approximately 4–6 hours using the included 36V2A charger.

Brand & Trust Module

• Fiido – 8 years of urban e-bike innovation

• EN15194，UN38.3 and MSDS. Battery meets EU standard.
  EU compliant with 250W motor.

• Customer Support: service@fiido.com | +85256216918 (Mon–Fri, 9AM–10PM GMT+8)

• Warranty: 24-month warranty on the bike, 36-month frame warranty

Customer Reviews of the Fiido C21

Ahmad - Amazing Bike!!!

⭐⭐⭐⭐⭐
"Great bike! I’ve had it for 2 months now and I absolutely love it. It's lightweight, well-built, comfortable, and looks amazing. It doesn't look like a typical e-bike, which is a huge plus. The range is great for both city and gravel rides. Best of all, it offers amazing value for money. Highly recommend!"

Fredrik Hallgren - Satisfied Customer

⭐⭐⭐⭐⭐
"I received my C21 in late July 2025. Timely delivery, and the unboxing and assembly were a breeze. The craftsmanship and quality of the bike exceeded my expectations. It runs super smooth with the torque support system, making for a great riding experience. Highly impressed!"

Anonymous - Perfect for the City

⭐⭐⭐⭐⭐
"I’ve been using the C21 for commuting to work, covering about 250 km so far. The battery easily covers my 25 km round trip. The only thing I’d upgrade is a spring saddle support—potholes are a bit harsh. Otherwise, an excellent bike. So far, I’d rate it a 10!"