Stealth's 6.2 kW Australian off-road machine, decoded with real physics: where the 43-mile claim goes, what the Hexbox gearbox really does, why the pedals matter, and who it is for. Sources on everything.
A high-power machine that lives in the strange gap between an e-MTB and a real dirt bike: 6.2 kW peak, around 50 mph, a proprietary 6-speed Hexbox gearbox, and pedals. The catch is range: the 43-mile claim is flat-terrain economy mode without pedaling, and it is not street-legal. A specialist tool, and a fast one.
What we know: related Stealth models have listed well into five figures (the B-52R near US$8,890 plus roughly $3,000 US freight, the B-52X around US$12,800 at some retailers), so budget accordingly and confirm the exact B-52 configuration and landed cost before buying. Off-road use means no registration or insurance line.
Every module behind the headlines: who it is for, claims vs. physics, the Hexbox, charging, parts, and the standard scorecard. All sourced.
An Australian off-road bike that blurs the line between a high-power e-MTB and a real dirt bike. A 6.2 kW hub motor, pedals, a proprietary 6-speed Hexbox gearbox, around 50 mph, and roughly 112 to 115 lb. Plan for the 43-mile claim being flat-terrain economy mode, far less at full power, and no street-legal status. A specialist machine for experienced riders. Here is how the numbers work.
Start here, the right answer depends entirely on who is asking.
Same bike, very different answer depending on the rider. We lead every report with this so nobody buys the wrong machine.
The sweet spot. A quiet, high-power, pedal-capable machine with serious 180mm suspension and 4-piston brakes, for riders who understand they are buying a niche product with niche parts support and the skill to use 50 mph off-road.
If you have outgrown a normal e-MTB and want pedal-assist plus a real throttle, the B-52 delivers. Just know it weighs about twice a trail e-MTB and behaves more like a light motorcycle at speed.
Not street-legal as an off-road machine in most places, and at 50 mph it is not a casual trail bicycle either. Local e-bike rules vary widely, so a road-commuter use is risky and region-dependent.
Heavy, fast, boutique, and parts-dependent on Stealth. This is not a first bike, and it is not the cheapest or simplest way into electric off-road. Skip it if you want simple or affordable.
Same bike, two stories. The struck-through line is the listing; the big number is what to actually expect. The "why" is in Part C.
What is genuinely clever, and which "innovations" are really table-stakes. The part the brand's own page never tells you.
The B-52's identity is built on a couple of genuinely unusual ideas. Each badge tells you whether it is a real engineering edge, normal, or marketing gloss.
A proprietary electromechanical push-button 6-speed gearbox, sealed and described as maintenance-free, with a wide gear range. Genuinely unusual on an electric bike, and it helps both acceleration and range by keeping the system in an efficient band.
★ Genuine edgePedals let riders add torque bursts and extend range, separating the B-52 from pure throttle-only dirt bikes, and keeping it in e-MTB cultural territory in some markets. Odd until you ride it, then it makes sense.
✓ Solid180mm-travel suspension and 4-piston hydraulic brakes on 250mm rotors. That is real motorcycle-grade kit for the speeds involved, and a reason the bike can be ridden hard with confidence.
✓ SolidA decent-capacity pack for a bike this size, but the v/Ah split and exact usable capacity are not detailed by the maker, and there is no removable swap-pack story like some rivals. Capacity is solid; the spec transparency is thin.
≈ Capable, lightly documentedMarketing specs vs. the physics. The math is simple, battery capacity and a few formulas, so let us run it.
Peak watts make a great headline; they are not what carries you for more than a few seconds. Convert to the unit everyone feels.
Stealth quotes 6,200 W peak for the B-52, with maximum torque around 150 Nm. Convert peak watts to horsepower:
The headline gap. The claim is not a lie, it is a best-case economy-mode number without pedaling. Here is the arithmetic from the 2.5 kWh pack.
Step 1, real energy in the tank. Stealth quotes a 2.5 kWh pack but does not publish the nominal voltage and amp-hour split, so we cannot derive V times Ah here; we will not invent them. We start from the stated 2,500 Wh.
Step 2, how much you spend per mile. Consumption is the whole game, and it explodes with speed because drag rises with the square of speed. Gentle economy-mode riding on flat ground sips; pinned off-road riding drinks.
Around 50 mph (80 km/h) claimed. Genuinely honest. But hitting top speed is exactly what destroys the range above.
Held near top speed, the bike draws hard just to maintain pace, so consumption spikes. Run the same range formula pinned:
So the "50 mph" and the "43 miles" on the same spec sheet are mutually exclusive: you get one or the other, never both. That is the most important thing the marketing never says out loud. The pedals are the escape hatch, leg power genuinely extends range.
Charge time is just battery size divided by charger power. Stealth quotes a real-world figure, and we can sanity-check it.
Stealth states the bike charges from any 110/240V household outlet with a recharge time around 3 hours. Sanity-check that against the pack with the standard formula:
Shopping for one of these, you will see the B-52 name across several different models. They are not all the same bike; here is how to read them.
| You will see | What it really is | Trust it? |
|---|---|---|
| B-52 / B-52X / B-52R | Different model years and trims. The R and X are higher-power and more expensive; confirm exactly which one you are pricing. | check the variant |
| 6,200 W | Peak power for the B-52 / B-52X. The B-52R doubles up; do not assume one figure covers all. | burst, by model |
| 2.0 vs 2.5 kWh | Battery options vary by model and year. A 2.0 kWh version claims ~60 mi economy; the 2.5 kWh claims ~43 mi in some listings. | option-dependent |
| "Up to 43 mi / 70 km" | Economy mode, flat ground, no pedaling, fresh battery. | lab best-case |
| 150 Nm torque | Maximum hub torque on the B-52X, roughly 111 lb-ft. Strong and real. | real |
| "Street legal" | Off-road as configured; at 50 mph e-bike legality is region-specific. Verify locally. | verify locally |
We will not guess a sticker we cannot source. Here is what we can say honestly.
Stealth does not publish a single transparent global price for the base B-52, and US delivery stacks significant freight and import duty on top. Rather than invent a number, we show the range of related-model pricing and the line items you will face.
| Line item | Typical | Notes |
|---|---|---|
| Bike (related models) | ~$8,900–$12,800 | B-52R ~US$8,890; B-52X ~US$12,800 at some retailers. Base B-52 not separately confirmed. |
| US freight / import | ~$3,000 | Quoted for the B-52R to the US; varies by location |
| Sales tax / duties | varies | Country and state dependent |
| Starter gear (helmet, armor) | $300–$500 | Non-negotiable at 50 mph off-road |
| Realistic landed cost | confirm before buying | Boutique import; get a written quote |
Insurance and registration are not assumed, since the B-52 is used off-road. Electricity is near-free: a full charge of a 2.5 kWh pack at $0.17/kWh is roughly $0.47, so charging is a rounding error in ownership.
What breaks, who fixes it, and whether you can get parts.
We read the reviews and owner discussion so you do not have to, and summarize the recurring themes, not cherry-picked raves. This is a boutique machine with a thinner public track record than mass-market bikes.
A bike is only as ownable as its parts supply. Here it is a mixed picture: standard bicycle parts are easy, the Stealth-specific parts are not.
Much of the B-52 uses mountain-bike-derived components (tires, brakes, suspension consumables) that are serviceable through normal bicycle channels. The catch is the proprietary core: the Hexbox gearbox and Stealth-specific frame parts come only from Stealth. That is the usual boutique-brand trade-off for owning something this unusual.
| Part category | Availability | Source |
|---|---|---|
| Tires, brake pads, suspension service | good | normal MTB channels |
| Battery pack (2.5 kWh) | fair | Stealth direct |
| Hexbox gearbox parts | Stealth only | Stealth direct |
| Frame / Stealth-specific parts | Stealth only | Stealth direct |
One scorecard, identical axes on every bike.
Every e-moto on the site is scored on these same eight axes, by the same rules, so a 5 here means the same thing as a 5 anywhere.
Our standing methodology, run identically on every e-moto, including bikes whose makers do not publish every number.
The honest way to compare two batteries. Stealth states 2.5 kWh but not the V × Ah split, so we use the stated Wh.
You never use 0 to 100%. The BMS holds a reserve and voltage tapers at the bottom. We assume ~88%.
Consumption is the lever: ~58 Wh/mi economy, ~75 mixed, 110+ flat-out. Drag rises with speed².
6,200 W peak is ~8.3 hp. The continuous rating is not published, so we say so.
The maker's ~3 hr claim implies a ~900 W charger; the exact wattage is not published.
| Cost assumption | We used | Change it if… |
|---|---|---|
| Annual mileage | 1,500 mi/yr (7,500 / 5 yr) | You ride more → consumables rise |
| Electricity rate | $0.17 / kWh (US avg) | Your utility differs (cost is tiny) |
| Sales tax / duties | Region-dependent | Import duty varies by country |
| Battery life | Not modeled (price unconfirmed) | Boutique pack pricing via Stealth |
| Resale | Not modeled (thin market data) | Niche resale is hard to predict |
We cite everything and date it, because specs, prices and tariffs change. Manufacturer figures are labeled as claims; real-world numbers are our estimates from the methodology above. Spot an error? Our corrections policy means we fix it in public.
Sources retrieved May 2026. Manufacturer pages state claimed specs; treat them as marketing figures, not independent tests. The exact base B-52 price, continuous power, charger wattage, and v/Ah pack split are not published, and we have not invented them. We re-check pricing periodically because boutique imports move quickly.