Earth T-REX 650B SP Hard Tail
Pedal-assist, rated to 250W, assist cuts at 25 km/h. Declared by the brand; declaration not independently sighted.
Earth T-REX 650B SP Hard Tail (2026) at a glance
The Earth T-REX 650B SP is a 27.5-inch mid-drive hardtail with a 100Nm EARTH ATM SP motor, a 600Wh Samsung battery, Shimano Altus 9-speed, 180mm Shimano hydraulic brakes, a 100mm lockout fork and Schwalbe Smart Sam tyres. Earth states EN 15194 25 km/h assist.
The Earth T-REX 650B SP Hard Tail is a trail emtb e-bike sold in Australia at $3,590 (price checked 9 Oct 2026). It pairs a EARTH ATM SP mid-drive mid drive motor with 100Nm of torque, a 600Wh battery rated for up to 100km, 27.5 x 2.35 Schwalbe Smart Sam wheels, and weighs 26kg. It is listed as a 250W pedal-assist e-bike limited to 25 km/h for Australian roads.
Is it for you?
Best suited to
Riders who want Earth's 100Nm mid-drive in a 27.5-inch hardtail for paths, gravel and light trails.
Standout strength
100Nm of mid-drive torque with Schwalbe Smart Sam tyres and a claimed 50 to 100km range from 600Wh.
The main compromise
Altus gearing and a 100mm fork are entry level for trail riding, and nominal wattage is not published.
Consider something else if
You want the cheaper 80Nm PRIME S Hardtail, or bigger 29-inch wheels.
Check before you buy
Confirm the frame size and the 25 km/h on-road setting at purchase.
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 650B SP Hard Tail vs T-REX 29SP Hard Tail
| Earth T-REX 650B SP Hard Tail | Earth T-REX 29SP Hard Tail | |
|---|---|---|
| Price | $3,590 | $3,590 |
| Motor | EARTH ATM SP mid-drive, mid drive | EARTH ATM SP mid-drive, mid drive |
| Torque | 100 Nm | 100 Nm |
| Battery | 600 Wh | 600 Wh |
| Claimed range | 50 to 100 km | 40 to 70 km |
| Weight | 26 kg | 26 kg |
| Frame | 6061 aluminium hardtail | 6061 aluminium hardtail |
| Wheels | 27.5 x 2.35 Schwalbe Smart Sam | 29-inch (Schwalbe Smart Sam tyres) |
| Category | Trail eMTB | Trail eMTB |
| Availability | In stock | In stock |
Choose the T-REX 650B SP Hard Tail if
you want this spec at this price; on paper the two are very close, so ride both if you can.
Choose the T-REX 29SP Hard Tail 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
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 650B SP Hard Tail cost in Australia?
The Earth T-REX 650B SP Hard Tail is listed at $3,590 (ride-away (incl GST)). 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 Earth T-REX 650B SP Hard Tail road legal in Australia?
Yes. The Earth T-REX 650B SP Hard Tail 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 is the range of the Earth T-REX 650B SP Hard Tail?
The Earth T-REX 650B SP Hard Tail has a claimed range of 50 to 100 km from its 600Wh 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 Earth T-REX 650B SP Hard Tail have?
The Earth T-REX 650B SP Hard Tail uses a EARTH ATM SP 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.
How much does the Earth T-REX 650B SP Hard Tail weigh?
The Earth T-REX 650B SP Hard Tail weighs about 26 kg. That matters if you need to lift it onto a car rack, carry it up stairs, or store it, since e-bikes are heavier than regular bikes because of the motor and battery.
Who sells and backs the Earth T-REX 650B SP Hard Tail 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.