Earth PRIME S Hardtail
Pedal-assist, rated to 250W, assist cuts at 25 km/h. Declared by the brand; declaration not independently sighted.
Earth PRIME S Hardtail (2026) at a glance
The Earth PRIME S Hardtail is a mid-drive trail hardtail with an 80Nm motor, a 522Wh Samsung battery, Tektro hydraulic brakes and Shimano 8-speed gearing. Best for paths, gravel and light trails. Earth states it is limited to 250W and EN 15194 compliant.
The Earth PRIME S Hardtail is a trail emtb e-bike sold in Australia at $3,090 (price checked 22 Sep 2026). It pairs a EARTH 80Nm mid-drive mid drive motor with 80Nm of torque, a 522Wh battery rated for up to 60km, 27.5in (CST Rock Hawk 2.4) wheels, and weighs 27kg. 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 a mid-drive hardtail for bike paths, gravel and light trails from an Australian brand.
Standout strength
A genuine 80Nm mid-drive on a hardtail with hydraulic brakes and knobbly tyres, at the value end of the market.
The main compromise
A 522Wh battery and an 80Nm drive are modest for serious trail climbing.
Consider something else if
You ride steep technical trails that need a full-power performance eMTB.
Check before you buy
Confirm the tyre and frame spec suit your terrain, and consider the dual-battery option for range.
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.
PRIME S Hardtail vs REX Hard-Tail
| Earth PRIME S Hardtail | Earth REX Hard-Tail | |
|---|---|---|
| Price | $3,090 | $2,790 |
| Motor | EARTH 80Nm mid-drive, mid drive | EARTH 60Nm rear hub, hub drive |
| Torque | 80 Nm | 60 Nm |
| Battery | 522 Wh | 500 Wh |
| Claimed range | 40 to 60 km | 40 to 70 km |
| Weight | 27 kg | 27 kg |
| Frame | Hardtail aluminium | Hardtail aluminium |
| Wheels | 27.5in (CST Rock Hawk 2.4) | 27.5in (CST Patrol 2.25) |
| Category | Trail eMTB | Trail eMTB |
| Availability | In stock | In stock |
Choose the PRIME S Hardtail 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 REX Hard-Tail if
it costs $300 less; 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.
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Common questions
How much does the Earth PRIME S Hardtail cost in Australia?
The Earth PRIME S Hardtail is listed at $3,090 (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 22 Sep 2026.
Is the Earth PRIME S Hardtail road legal in Australia?
Yes. The Earth PRIME S Hardtail 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 PRIME S Hardtail?
The Earth PRIME S Hardtail has a claimed range of 40 to 60 km from its 522Wh 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 PRIME S Hardtail have?
The Earth PRIME S Hardtail uses a EARTH 80Nm mid-drive motor, in a mid-drive position, producing 80Nm of torque. Mid-drive motors climb hills better because they work through the bike's gears.
How much does the Earth PRIME S Hardtail weigh?
The Earth PRIME S Hardtail weighs about 27 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 PRIME S Hardtail 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.