FIIDO D4S Foldable Electric Bike

Regular price $950.00

Shipping calculated at checkout.

Customer Reviews

Based on 5 reviews
Paul Kostel
Well made

I was excited to get an electric bike, and I am happy with this fiido bike. I went 8 miles in about 45 min today which was pretty fast. It is well built and good quality, the assembly was easy, and it’s pretty well equipped with features like the disc brakes, headlight, horn, and the folding makes it easy to transport as well as store it. I would recommend.

Mark M
Exceeded my expectations

I didn't know what to expect at first. But this ebike is fast and well built. Also, it's not that heavy at 18kg. I can also fold it and place it in my small trunk. The electric power is smooth and I like that it kicks in when I need it. It's a great starter ebike and been using it a lot since I got it.

Jean Fortin
Foldable ebikes for Westfalia

Finally got my 2 ebikes from O2bikes after a few hickups with customs and carriers from the "US warehouse". The Fiido D4s is a real joy to ride with plenty of power. Look forward to the camping season. Thanks Nicolas.

Lightweight and Portable Ebike

Took a chance buying this Ebike but there are so many youtube videos and everyone seems happy with their purchase I felt comfortable. It is so much fun! There is more than enough power from the motor you don't need more. I should have bought one last year, now I get to enjoy it all summer. Customer service is amazing too, nice to get a reply within the day. I will tell my family and friends to buy one.

David I.
Amazing Value Ebike

I received the Fiido D4s, and I must say it’s an amazing bike. Everything is really well done, the package, the way the bike was secured inside the package with hard foam, the overall build quality, brakes and gears very well adjusted. Customer service was always nice and helpful, I can only recommend. Great value for money!

FIIDO D4S Foldable Electric Bike

We now offer a 3D printed adapter to make the FIIDO D4S Battery easily removable from the frame. Please check the product page here

*Use code FREEADAPTER at checkout for a Free Battery Adapter when you purchase a FIIDO D4S (Limited time offer 1pc adapter per D4S)


Three Modes Of Riding
It has pure electric mode, riding mode , power assist mode three riding modes.
Gear 1 Speed: 10km/h (6mph)
Gear 2 Speed: 18km/h (11mph)
Gear 3 Speed: 25km/h (Can be unlocked for max speed of 33km/h or 20mph)

20 Inch E-Bike Tires
Inflatable Rubber CTS Professional E-bike Tires With Front and Rear Double Disc Brakes.

250W Brushless Motor 25km/h (15.5mph) Max Speed
Hidden in the 20-inch rear wheel is the 250W brushless gear motor, which boasts compact size and light weight to provide greater torque for climbing slopes with lower energy consumption.

Weight including battery 18.5KG (41lbs), Max Load 120kg (264lbs)
The main body is made of high-strength aluminum alloy, light, no rust.

Hidden Battery, 36V 10.4AH 374Wh Lithium Battery, Up To 80km (50miles) Range
The FIIDO D4S has a 36V 10.4Ah 374Wh removable battery which allows for longer distance to be traveled and is convenient to replace the battery. 374Wh lithium battery allows 30-40km (18-25miles) range in pure electric mode, 60-80km (37-50miles) range by power assist mode.

Adjustable Saddle Height
Adjustable saddle tube 80cm - 110cm (31.5"-43.3")
Recommended rider height 1.6m - 1.9m (5'2" - 6'2")

Ultra-bright Headlights
Features an ultra-bright headlight for added safety in night riding.

FCC & CE Certification

User Guide

FIIDO Limited Warranty




This foldable electric bike features a 20 inch wheel and weighs only 18.5kg (40lbs). The 250W brushless gear motor and hidden battery with 36V 10.4Ah capacity powers the bike up to 80kms (50miles) in pedal assist mode. It is foldable and easily fits in the trunk of your car and the adjustable stem comfortably fits people with different heights.

Designed with a 6-speed Shimano derailleur, change your gears with or without the electric assistance. Choose between 3 level of assist and find your personalized riding style. This is your perfect workout and urban companion.

All models include front and rear fenders


Tech Specs

FIIDO D4S Weight
Weight including battery 18.5kg (41lbs)

Maximum Weight Capacity
120kg (265lbs)

Operating Temperature 
-10c to +50c  
 14 to 122 Fahrenheit 
Charging temperature 
0c to 45c 
32 to 113 Fahrenheit

Maximum Speed
Around 25km/h

Li-ion Battery 36V 10.4Ah 374Wh

Recharge Time

Electricity assisted mileage

LCD Display

Drive Type
Rear hub drive

Frame Material
Aluminum Alloy

Brake Type
Mechanical Disc Brake


Steel 52T

Shimano 6-Speed

Brushless Gear Motor 250W

Front Light
LED Light

Wheel Size
20 inch

Tire Size
CST 20x1.75 inch

Net Weight
18.5kg (41lbs)

Saddle Height

Folded Size

Full Size

One-year limited warranty

What's included in the box?
1 FIIDO D4S E-Bike
1 FIIDO D4S Charger
1 Kickstand
1 Open Spanner
1 Allen Key



It is the complete responsibility of the customer to ensure that you operate your e-scooter within all country and local laws.

The customer assumes all liability and risk associated with the use of electric scooter products and holds and its owners free from any liability caused by their use.


Shipping to USA lower 48 states 3-7 business days (FREE)
Shipping to Canada 3-10 business days (Flat rate USD60 includes shipping and duty/import fees. Provincial Taxes are extra)

Shipping to most of Europe 3-7 business days (Flat rate USD70)

For other countries please contact us for shipping quote