G-Force ZM Pro Review: Big-Battery Moto E-Bike Energy (And a Real-World Range Test)
May 4, 2025
The G-Force ZM Pro is one of those e-bikes that makes sense the moment you throw a leg over it. It’s unapologetically moto/moped styled, it’s built around comfort, and it’s carrying a comically large battery that immediately changes what “a long ride” feels like.
I spent time going over the details, getting it set up, putting street miles on it, pushing it on hills, and doing a hard range test (full throttle + max pedal assist). Here’s what stood out in real-world use.
First look: moto style, but with some clever practicality
From a few feet away, the ZM Pro leans hard into that filled-in “moto frame” look. No open triangle. Everything looks intentional and substantial.
Two design details really jumped out to me right away:
The integrated lighting: a retro-style front headlight and an integrated rear light with brake functionality.
The frame storage compartment: it’s a lockable, built-in storage box that’s accessed with a key.
That storage is genuinely useful. It’s not a soft bag—it’s a plastic compartment (more like a built-in lockbox), and there’s a lot of room in there for ride essentials.
The battery is the main character
This bike’s whole personality is the battery.
It runs a 52V 60Ah pack, and it’s huge in your hands—like, “okay I get why this bike is heavy” huge. Removing it is straightforward, but there is a catch: I had to remove the faux gas-tank cover first because the battery can knock into it on the way out.
Once that cover is off, the battery release process is simple: unlatch and slide it out.
Worth noting: the ZM Pro is a heavy e-bike (it shipped at about 138 lb in the box). If you’re planning to carry it up stairs or load it onto something, popping the battery out first makes the whole situation way more manageable.
Controls and power delivery: cadence sensor behavior, but tuned well
The ZM Pro uses a rear hub motor (rated 1000W, 1500W peak) with a cadence sensor (not a torque sensor). If you’ve ridden cadence-sensor bikes before, you know the vibe: once you start pedaling, it delivers power based on pedal rotation rather than how hard you push.
On the road, that means:
It “kicks in” decisively.
It’s not subtle the way a torque sensor can be.
The power steps between assist levels feel noticeable—especially as you climb the PAS levels.
It also has a right-hand half-twist throttle, and throttle modulation felt smooth and predictable to me.
Comfort is the ZM Pro’s superpower
The first thing I noticed after sitting down: this is a super comfortable bike.
The long, wide saddle has a lot of cushion—enough that I wouldn’t bother upgrading it. Add in the dual rear shocks, a front suspension fork, and 20x4 fat tires, and the ZM Pro settles into that “cruising all day” role really naturally.
On rougher pavement and broken roads, I stayed seated more than I normally would because the bike just soaked it up.
A few real-world comfort notes:
The rear end felt good for my weight (about 145 lb).
The front suspension felt better once I had some speed—slow-speed chatter still comes through.
The swept-back cruiser bars worked better than I expected on this bike. The ergonomics made sense with the seating position.
Handling: heavy, but not clumsy
Yes, it’s heavy. But it didn’t feel like a nightmare to maneuver.
As long as I leaned the bike and rode it like the heavyweight it is, it stayed stable and confidence-inspiring. If you’re coming from Super73-style bikes, you’ll feel right at home.
Brakes: better than I expected
The ZM Pro uses hydraulic disc brakes (the calipers are XOD, and they appear to be dual piston) with thick rotors.
In my braking test, it stopped harder than I expected for a bike with this much mass. That matters here, because big battery e-bikes tend to creep into “this is basically a light moped” territory, and weak brakes would be a dealbreaker.
One caveat: I did get some brake noise early on, and it felt like there may have been rubbing that could be cleaned up with a quick adjustment.
Hills and real-world power
With the throttle and pedal assist, it climbed steep inclines better than I expected. On one very steep section, I didn’t quite make it to the top (I got about three-quarters of the way), but overall it feels like it has the kind of push you want for street riding and casual off-road.
This is also where I actually prefer cadence sensor behavior on a heavy bike like this. Torque sensors can feel great on lighter, more pedal-forward e-bikes, but on something heavy and throttle-capable, the cadence sensor helps it feel more like what it visually resembles.
Street speed feel
At speed, it feels stable and comfortable—more “long cruise” than “high-strung rocket.”
On flat ground, I saw it topping out around the low 30s on the display. It gets up to around 30 mph quickly, then starts to taper.
Range test: full-throttle worst-case results
I ran a hard range test: full throttle, full pedal assist, basically trying not to give the motor a break.
Here are the key results from the test ride segment:
Starting voltage: 59.2V (displayed as 100%)
Halfway point: 10.15 miles, 25.8 mph average, 56.1V
Final distance: 20.32 miles
Average speed: about 25.7 mph
Battery after: about 65%
Using the battery’s capacity (52V 60Ah = 3020 Wh) and the percentage used, the calculated worst-case range came out to about 58.06 miles per charge.
That’s the “I’m riding it like I’m late” result.
In normal riding—backing off the throttle, mixing in sane pedal assist, and not trying to hold top speed constantly—it’s easy to see how this bike could stretch significantly farther. The battery is simply massive.
Small design details I’d think about
There are a couple practical things I’d want you to know before buying.
The frame sits low in one key spot
Part of the frame dips lower than the swing arm, so ground clearance isn’t great there. If you’re loading this bike up a steep ramp (truck, trailer, hitch rack setup, etc.), scraping is likely.
The storage box is awesome, but it’s bare plastic inside
The lockable storage is a standout feature, but since it’s a hard plastic box, loose items will rattle unless you add some padding or organize your gear.
What We Like
Massive 52V 60Ah battery that supports genuinely long rides
Worst-case full-throttle range math still lands around 58 miles
Comfortable saddle and a ride quality that encourages long cruising
Stable handling for a heavy, moto-style fat tire e-bike
Hydraulic disc brakes with strong stopping power for the bike’s weight
Lockable, integrated frame storage is genuinely useful
Integrated lights (including a brake light)
Things To Consider
It’s heavy; removing the battery helps, but this isn’t a “carry it upstairs” bike
Battery removal may require removing the faux tank cover first
Low ground clearance in a key frame section can lead to scraping on ramps/steep transitions
Cadence sensor power delivery is punchy and less nuanced than a torque sensor
Storage compartment is plastic and may need DIY padding to prevent rattling
Final Thoughts
The G-Force ZM Pro feels built for riders who want that moto e-bike look, real comfort, and the freedom to ride far without obsessing over the battery gauge.
For me, the big takeaways were the cruising comfort and the battery-backed confidence. Even hammering it in a worst-case range test, the numbers were impressive—and in normal riding, it’s the kind of e-bike that makes “let’s just keep going” feel like a realistic plan.
If your priority is light weight or pedal-forward efficiency, this probably isn’t your bike. But if you want a stable, comfortable, long-range fat tire cruiser with a few clever touches (that lockable storage is legit), the ZM Pro is a strong option.
Links
G-Force ZM Pro (use promo code RunPlayBack for $200 off): https://g-forcebike.com/products/g-force-zm-pro?ref=IWhqSgR5zleeB3&variant=52431041069427
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Fox Racing Bike Gloves: https://amzn.to/40P5SyQ
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Hafny Handlebar Bike Mirror: https://amzn.to/3FVubmN
Veeape Electric Air Pump: https://amzn.to/3LPLTf9
Denlix Military Sling Bag: https://amzn.to/3LTKN2c
Lamicall Bike Phone Mount: https://amzn.to/3LXmD6O
Onvian Wireless Bike Alarm: https://amzn.to/42KUgyE
RunPlayBack Merch: http://shop.runplayback.com/