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Quick Verdict
Power + Range Pick
GREATWORK M8 PRO Review: Dual-Motor Power for Steep Hills (and Big Tradeoffs)
A dual-motor, full-suspension fat-tire beast that climbs hard and rides stable—best for tall riders who can live with the weight.
- Best for: steep hills, sand/gravel, and long rides where smaller batteries tap out.
- Highlights: 5,000W peak dual motors + 52V 25Ah (1,300Wh) battery; full suspension; hydraulic brakes.
- Trade-offs: ~97 lb and tall standover—great on the ride, annoying in stairs/storage.
If you want maximum hill power + fat-tire stability + legit long-range potential in one bike, the GREATWORK M8 PRO is the rare “dual-motor brute” that still feels controlled. In my rides, it launches hard, stays surprisingly composed on rougher surfaces, and the hydraulic brakes keep the speed in check without panic stops. The tradeoffs are real: it’s very heavy, fits taller riders best, and the cadence-based assist feels less refined than torque-sensor bikes.
Best for: steep hills, sand/gravel, bigger riders, long commutes, and riders who want a loaded commuter kit (signals/fenders/rack) out of the box.
Not ideal for: anyone who needs light weight, low standover, or a torque-sensor “natural” ride feel.
Who Should Skip This Bike
Skip the M8 PRO if you check any of these boxes:
- You carry your bike up stairs or lift it onto racks often (this is a ~97 lb problem).
- You’re under ~5’7″ or have a shorter inseam and hate tall standover.
- You want a torque sensor feel (smooth, proportional assist) instead of cadence “on/off” style power.
- You mostly ride bike paths with strict Class 2/3 enforcement and don’t want to manage speed modes.
- You want app/Bluetooth features and a more “smart” display ecosystem.
What the M8 PRO Is
This is a 26″ × 4.0″ fat-tire, full-suspension, dual-hub-motor e-bike built around one idea: make hills feel smaller and rough surfaces feel calmer.
The dual motors deliver a 5,000W peak punch, backed by a 52V 25Ah (1,300Wh) battery, which is why it has that “keep pulling no matter what” personality on grades and loose terrain.
Real-World Ride Impressions
Power & Hill Climbing
The first thing you notice is how fast the bike stabilizes after a hard launch. Dual-motor bikes can feel twitchy; this one ramps power in a more predictable way. On a steep climb I use as a benchmark, the M8 PRO held mid-20s mph in PAS 3–4 without feeling like it was straining.
The single/dual motor switch is more useful than it sounds:
- Single motor: calmer behavior for errands and flatter routes, plus better range.
- Dual motor: the “cheat code” for steep grades, loose dirt, and sand.
Handling & Comfort
This is where the full suspension actually matters. Between the front fork + rear coil shock, the bike takes the edge off potholes and chunk better than typical hardtail fat bikes. Pair that with 4″ tires at sensible PSI and the ride turns into “plush truck” mode—especially on washboard paths and beat-up city streets.
It’s not nimble. It’s stable. That’s the point.
Braking & Control
With a bike that can build speed quickly, brakes are everything—and the hydraulic discs are the quiet hero here. Modulation feels confident, not grabby, and I could trail brake into turns instead of doing the classic “slam and pray” routine you get on weaker setups.
Range & Battery
That 1,300Wh battery is the reason this bike makes sense for long rides. I found it easy to plan:
- 40–60 mile rides with elevation when running PAS 2–3 (and not being throttle-happy)
- Around ~38 miles on a mixed route using PAS 3 with generous throttle use
- If you ride mellow on flatter paths, the claimed ~100 miles PAS is believable
Charging from low to full took just under ~9 hours on my wall timer. The battery locks in securely and is simple to remove for indoor charging.
Night + Urban Use
The included kit is legitimately practical: headlight, brake light, and turn signals reduce the need to add aftermarket stuff (and avoid messy wiring). Add the rack + full fenders, and it goes from trail-curious to commute-ready fast.
Fit & Ergonomics
This bike favors taller riders. The big flags:
- Standover: ~30.7″
- Seat height: ~36″–42″
- Recommended rider height: roughly 5’7″–6’4″
At 5’10”, I felt right at home. If you’re shorter, it’s not impossible—but it’s the kind of “measure twice, buy once” situation.
What I Like
- Controlled brute power: strong acceleration without feeling chaotic
- Climbing authority: doesn’t fade on steep grades or loose patches
- Comfort stack works: suspension + fat tires + spring saddle = real cushioning
- Hydraulic brakes match the speed: better confidence and smoother control
- Complete commuter kit: signals, lights, rack, fenders included
- Big battery = route freedom: you stop planning rides around “will it make it?”
What I Don’t Like
- It’s heavy in daily life: moving it in tight spaces is work, stairs are worse
- Tall fit limits who it’s for: shorter riders may feel boxed out
- Cadence assist isn’t refined: can feel a bit “surge-y” compared with torque sensor bikes
- Speed legality is complicated: the higher assist speed is not for many public roads/paths
- No app ecosystem: display is clear, but the system is basic
Pros & Cons
| Pros | Cons |
|---|---|
| Dual motors deliver serious hill power and fast acceleration | Very heavy (~97 lb) for carrying or frequent lifting |
| 52V 25Ah (1,300Wh) battery enables real long-range riding | Tall standover + high seat range fits taller riders best |
| Full suspension + fat tires = stable, cushy ride on rough surfaces | Cadence-based PAS feels less natural than torque sensor |
| Hydraulic brakes provide confident stopping control | No app/Bluetooth; UI is functional, not fancy |
| Turn signals + brake light + fenders + rack included | High-speed capability is often off-road/private-property only |
What’s Included
- M8 PRO e-bike (dual motor, full suspension, 26″ × 4.0″ tires)
- 52V 25Ah removable battery + charger
- 3.5″ LCD display
- Headlight + rear light with brake light + turn signals
- Rear rack, full fenders, kickstand
- Basic tool kit, manual, reflectors, pedals
This is one of those bikes that doesn’t force you into immediate “add-on shopping” just to make it commute-capable.
Key Specs
| Spec | Detail |
|---|---|
| Motors | Dual hub motors, up to 5,000W peak (combined) |
| Battery | 52V 25Ah (1,300Wh) removable |
| Top speed | Up to ~45 mph in highest/unlocked assist (check laws) |
| Range | Up to ~100 miles PAS (lower assist); ~40–60 miles typical with heavier throttle use |
| Brakes | Dual hydraulic disc brakes |
| Suspension | Front fork + rear coil shock + spring saddle |
| Tires | 26″ × 4.0″ fat tires |
| Weight | ~97 lb |
| Max load | ~250 lb |
| Assembly | ~85% pre-assembled |
| Charge time | ~8–9 hours |
| Certification | UL 2849 (electrical system) |
Safety & Legality Notes
- Treat the highest assist speed as off-road/private-property territory unless your local rules clearly allow it.
- Re-check axle nuts and spokes after the first few rides—dual-motor torque can loosen things faster than single-motor bikes.
- Speed increases stopping distance fast. Ride like you’re on something that can actually move.
Final Breakdown
9.1 / 10
The GREATWORK M8 PRO is a high-power, long-range fat-tire machine that still feels controllable and practical. The dual motors and huge battery make steep grades and long rides feel easier than they should, and the included commuter gear (signals, lights, fenders, rack) makes it more than just a weekend toy.
Buy it if you want power, stability, and distance and you’re tall/strong enough to live with the weight. Skip it if you need lightweight handling, a low standover, or a torque-sensor ride feel.
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