FATFISH BIGGIE 20AH
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Description
Fatfish Biggie Fat Tyre Electric Bike

Bigger, better and built for the coast. The Biggie is a fat-tyre electric bike designed for taller riders who want extra control, stability and handling. Its 250W rear motor delivers high torque for take-offs and hills, and the 20-inch by 4-inch puncture-resistant tyres handle commuting and adventure riding alike.
A 680mm alloy handlebar sits a little higher than the OG for comfort and control. The MIK-ready rear rack takes cargo that slides on and off easily, and the built-in horn, LED lights and USB charging port make it practical for everyday use.
Highlights
- 250W rear motor with pedal assistance
- Top speed of 25km/h, locked by parental lock
- Throttle limited to 6km/h, not adjustable
- 19.6Ah (940.8Wh) Samsung battery with battery strap
- Shimano 7-speed drivetrain with 14-28T cassette
- Tektro hydraulic disc brakes with motor safety cut-off
- 60mm front fork with dual spring compression
- C900 LCD display with parental lock
- MIK-ready rear rack
- LED headlight and taillight, built-in horn and USB charging
- Marine-rated cables for easy servicing
Choose Your Colour
| Colour | Army Green, Black, Purple Haze, Smoke Grey, White |
|---|
Certification
| E-bike certificate (EN 15194) | OZC-260704-EA |
|---|---|
| E-bike certificate (NSW, UL 2849) | NSW29652 |
| Battery certificate | NSW29628/1 (battery QS4820) |
| Charger certificate | GMA-511074-EA (charger LBC045546020) |
| Model | Biggie |
Only use with the approved battery and charger listed on the certificate.
Street Configuration
| Continuous output | 250W |
|---|---|
| Pedal assist | Limited to 25km/h, cannot be unlocked |
| Throttle | Walk assist limited to 6km/h |
Specifications
| Motor | Fatfish custom tuned 48V 250W rear hub |
|---|---|
| Battery | 48V 19.6Ah (940.8Wh) Samsung, removable, with battery strap |
| Range | Up to 100km per charge in Eco mode (estimate) |
| Charger | 54.6V 2A output |
| Transmission | Shimano 7-speed, 14-28T cassette |
| Brakes | Tektro hydraulic disc with motor safety cut-off |
| Suspension | 60mm front fork |
| Tyres | 20" x 4.0" puncture-resistant |
| Max total weight | 125kg, including rider and cargo |
| Bike weight | 35kg (including battery) |
| Warranty | 3 years frame, 2 years battery and motor, 1 year other components |
Before using this vehicle, check the applicable local laws relating to your intended use of the vehicle on roads and road related areas.
Test Ride or Order
Book a test ride in store or order online. Not sure which bike suits you? Get in touch and we'll help you choose.






