AMPD Bros ACE-X Demon Series 4
This exceeds the 250W and 25 km/h pedelec rules and is not road-legal in Australia. Closed-course and private land only.
AMPD Bros ACE-X Demon Series 4 (2025) at a glance
The AMPD Bros ACE-X Demon Series 4 is the previous all-wheel-drive Demon: two Bafang hub motors (95Nm each), a 52V 25Ah Samsung-cell battery with a claimed 100km range, front and DNM rear suspension, 203mm 4-piston brakes and a Shimano Altus 7-speed. AMPD lists it as off-road private property only.
The AMPD Bros ACE-X Demon Series 4 is a moped e-bike sold in Australia at $4,490 (price checked 9 Oct 2026). It pairs a Dual Bafang hub motors, AWD hub drive motor with 95Nm of torque, a 1,300Wh battery rated for up to 100km, 20-inch Huntsman all-terrain wheels. It is an off-road model and is not road legal in Australia as sold.
Also sold or searched as: ACE-X Demon Dual, AMPD Demon Series 4.
Is it for you?
Best suited to
Private land and farm riders who want an all-wheel-drive dual suspension fat bike at a lower price than the Series 5.
Standout strength
Two Bafang hub motors (95Nm each), a 52V 25Ah battery, dual suspension and 203mm 4-piston brakes, 500 dollars under the Series 5 RRP on sale.
The main compromise
Off-road only, so it cannot legally be ridden on Australian roads or paths.
Consider something else if
You want to ride on roads or paths, where the road-compliant ACE PRO is the legal choice.
Check before you buy
Be clear on where you will ride it. On public roads it would be treated as an unregistered motor vehicle.
Full specification
Drive and power
Frame and ride
Australian compliance
This exceeds the 250W and 25 km/h pedelec rules and is not road-legal in Australia. Closed-course and private land only.
ACE-X Demon Series 4 vs ACE-X Demon S5
| AMPD Bros ACE-X Demon Series 4 | AMPD Bros ACE-X Demon S5 | |
|---|---|---|
| Price | $4,490 | $4,990 |
| Motor | Dual Bafang hub motors, AWD, hub drive | Dual Bafang hub motors, AWD, hub drive |
| Torque | 95 Nm | 95 Nm |
| Battery | 1,300 Wh | 1,300 Wh |
| Claimed range | 100 km | 100 km |
| Weight | TBC | 60 kg |
| Frame | Moto-style aluminium step-over, dual suspension, 180kg max load | Moto-style aluminium, dual suspension, two-up seat, 180kg max load |
| Wheels | 20-inch Huntsman all-terrain | 20 x 4.0 fat |
| Category | Moped | Moped |
| Availability | In stock | Pre-order |
Choose the ACE-X Demon Series 4 if
it costs $500 less; it is listed as in stock now.
Choose the ACE-X Demon S5 if
you prefer its frame, fit or finish; the core numbers are close, so fit and dealer support should decide it.
How you would ride it
AMPD Bros
Designed in Queensland, AMPD is the Australian-grown brand that built its name on fat-tyre adventure bikes and now claims best-selling status in its category every year since 2019.
Compare similar e-bikes
Common questions
How much does the AMPD Bros ACE-X Demon Series 4 cost in Australia?
The AMPD Bros ACE-X Demon Series 4 is listed at $4,490 (sale price at ampdbros.com.au (off-road only model)). eBikeFinder checks pricing against manufacturer and distributor information, and prices can change with sales and stock. This price was last checked on 9 Oct 2026.
Is the AMPD Bros ACE-X Demon Series 4 road legal in Australia?
Not as a bicycle. The AMPD Bros ACE-X Demon Series 4 sits outside the 250W pedal-assist standard (through higher power or a throttle that drives it beyond walking pace), so in Australia it is treated as a motor vehicle. That means it is for private property or off-road use, not public roads or shared paths, unless registered.
What is the range of the AMPD Bros ACE-X Demon Series 4?
The AMPD Bros ACE-X Demon Series 4 has a claimed range of about 100 km from its 1300Wh battery. Real-world range is usually lower than the claim, since it depends on assist level, rider weight, terrain and wind.
What motor does the AMPD Bros ACE-X Demon Series 4 have?
The AMPD Bros ACE-X Demon Series 4 uses a Dual Bafang hub motors, AWD motor, in a rear hub position, producing 95Nm of torque.
Who sells and backs the AMPD Bros ACE-X Demon Series 4 in Australia?
The AMPD Bros range is distributed in Australia by AMPD Bros (Gold Coast, QLD). It comes with a 2 years frame, 2 years motor and battery warranty. Buying from a brand with real Australian support matters most when something needs a warranty claim or a service.