T-REX RINO SP Fat
Pedal-assist, rated to 250W, assist cuts at 25 km/h. Declared by the brand; declaration not independently sighted.
Is it for you?
Best suited to
Riders who want a mid-drive fat bike for sand, fire trails and loose gravel, from an Australian brand with its own service base.
Standout strength
A 100Nm mid-drive working through a 9-speed Alivio drivetrain, which climbs soft ground far better than a hub motor, on Maxxis Mammoth 26 x 4.0 tyres.
The main compromise
The 600Wh battery is modest for a heavy fat bike ridden hard in sand, and Earth does not publish the nominal wattage.
Consider something else if
You mostly ride sealed paths, where a hub-drive cruiser costs less, or you need a clearly documented nominal wattage.
Check before you buy
Make sure you are buying the 100Nm version listed here, not the 110Nm RINO, and confirm the 25 km/h on-road setting.
Full specification
Drive and power
Frame and ride
Australian compliance
Pedal-assist, rated to 250W, assist cuts at 25 km/h. Declared by the brand; declaration not independently sighted.
T-REX RINO SP Fat vs AMPD Bros ACE Adventure
| Earth T-REX RINO SP Fat | AMPD Bros ACE Adventure | |
|---|---|---|
| Price | $3,990 | $3,290 |
| Motor | EARTH ATM 48V mid-drive, mid drive | Bafang rear hub, hub drive |
| Torque | 100 Nm | 80 Nm |
| Battery | 600 Wh | 960 Wh |
| Claimed range | TBC | 80 km |
| Weight | TBC | 35 kg |
| Frame | Aluminium fat-tyre hardtail | Aluminium moto-style fat-tyre, step-over or step-through |
| Wheels | 26 x 4.0 Maxxis Mammoth EXO | 20 x 4.0 Maxxis all-terrain |
| Category | Fat Tyre | Fat Tyre |
| Availability | In stock | In stock |
Choose the T-REX RINO SP Fat if
it has 20 Nm more torque for steep hills and heavy loads; its mid-drive motor works through the gears, which feels more natural on climbs.
Choose the ACE Adventure if
it costs $700 less; its battery is 360 Wh bigger, so you charge less often on long rides; its low step frame is easier to get on and off; its hub motor means less drivetrain wear and simpler servicing.
How you would ride it
Earth
Earth Electric Bikes is an Australian brand selling since 2009, with stores and support across Sydney, Brisbane, Melbourne and Adelaide. Its range spans three drive tiers: the budget REX rear hub, the PRIME S 80Nm mid-drive, and the flagship T-REX 100Nm ATM SP mid-drive, in commuter, trekking and hardtail frames.
Compare similar e-bikes
Common questions
How much does the Earth T-REX RINO SP Fat cost in Australia?
The Earth T-REX RINO SP Fat is listed at $3,990 (ride-away (incl GST), 100Nm version). eBikeFinder checks pricing against manufacturer and distributor information, and prices can change with sales and stock. This price was last checked on 2026-09-24.
Is the Earth T-REX RINO SP Fat road legal in Australia?
Yes. The Earth T-REX RINO SP Fat is a 250W pedal-assist e-bike that stops assisting at 25 km/h, which meets the road-legal e-bike standard in every Australian state. Compliance is asserted by the brand rather than independently verified, so confirm the current spec with the seller.
What motor does the Earth T-REX RINO SP Fat have?
The Earth T-REX RINO SP Fat uses a EARTH ATM 48V mid-drive motor, in a mid-drive position, producing 100Nm of torque. Mid-drive motors climb hills better because they work through the bike's gears.
Who sells and backs the Earth T-REX RINO SP Fat in Australia?
The Earth range is distributed in Australia by Earth Electric Bikes. Buying from a brand with real Australian support matters most when something needs a warranty claim or a service.