Amflow PX Carbon Pro Review

Consider the industry shaken. Amflow crashed the e-mtb party with their incredible first bike, the Amflow PL Carbon Pro, just a year ago, and while legacy motor makers rush to compete, the PX just rolled up and moved the goalposts.

Downhill Performance

We were really impressed with the descending performance of the PL, but wrote that we wished for a bit of adjustability in the geometry. The PX brings that adjustability in droves, offering 5 headset-angle settings, 2 bottom-bracket-height settings, and 4 chainstay-length settings. The kinematics are typical of a 4-bar setup, and the Fox Float X Factory shock helps you make the most of it.

While the motor and electronics are getting the most press, what they excel at on the way down is simply getting out of the way. At less than 47 pounds, the PX doesn't feel like too much of a bike to throw around, and that's a huge part of what impresses us about it. Amflow spec'd the bike with Schwalbe radials, and not just any Schwalbe radials but Gravity Pro tires. This is a heavy set of rubber, but we found them to be the most capable tires we've ridden. Period.

Amflow's new carbon rims add a bit more substance at the bead, measuring 39mm with 30mm internals, giving the tires an ideal profile and a bit more carbon at the bead. The amount of traction this wheel/tire combo provides gives you loads of confidence, allowing you to push harder, carry more speed, and decelerate in ways that simply weren't possible before. The cockpit feels more tailored to aggressive riders, with a 40mm-rise handlebar, a burly 4-bolt stem, and Amflow's new adjustable dropper post that provides 190mm of travel on our size Large test bike.

A Fox Factory 36 up front gives 160mm of travel and all the compression and rebound dampening adjustments you could expect from their top-of-the-line fork. The new 36 has a stiffer crown and feels far more capable than past models. We no longer want to swap it out for a 38, and the only time we felt any undesirable flex was when our heaviest testers (190-200lbs) were tackling big lines with the headtube adjusted to 63.2 degrees.

The adjustable headset cups that let you change the headtube angle by 0.5 or 1 degree from the stock 64.2. This allows the rider to make huge changes to the front end and tailor the bike to their riding style and regional terrain.

Our Large test bike has 478mm of reach and a 120mm head tube for a stack of 632.2mm. If we lost you with these measurements, know that Amflow is right where we'd expect it to be for a modern trail bike. If modern trail geometry doesn't float your boat, you'll find quite a bit of adjustability and even the ability to run a 29" rear wheel. The curved top tube ditched the Trunion (body-mount front, eyelet-mount rear) shock in favor of a standard (eyelet-to-eyelet) shock mount, lowering the standover height to 785mm.

The PX Carbon Pro is a bit more intrepid-feeling than the PL, mostly due to heavier tires and rims, a slightly slacker front end, and a smaller rear wheel. This gives the bike lots of courage in steeper terrain, and instead of feeling like a light e-bike, it feels more like a heavier enduro bike. At 46.3 pounds (without the headlight or pedals, and set up tubeless), you don't feel the bike pushing toward the outside of corners or dropping into low spots along the trail like you sometimes do on a heavier e-mtb.

The medium and large versions use 155mm crank arms, while the bigger bikes use 160mm arms. Paired with the modest 345-349mm bottom bracket height, this lets you pedal through rock gardens and corners with less risk of clipping a pedal. You can also use the Horst-link adjustment chips to achieve four distinct chainstay lengths, bringing the bottom bracket's total adjustability to 16mm.

Another big upgrade over the PL, and a standout feature of the PX, is the Magura Gustav Pro brakes. We had trouble getting enough braking power from the original PL's brakes, so we swapped pads and rotors, but only achieved modest gains. We didn't expect to find so much power and modulation in these brakes; they have the soft lever actuation that Magura is known for, with the raw power of the best brakes on the market. The 2.5mm thick rotors give a solid feel at the bite point, and we found them virtually unfazed by the heat of lengthy descents. As an added bonus, they use stealth hose routing that keeps the brake lines close to the handlebars, giving the cockpit a tidy look. To get that tidy look, you'll have to shorten your hoses as Amflow ships the bike with quite a bit of extra hose.

The PX coaxes you into the air, bringing total composure to the jump lines. It hits the sweet spot, where it's nimble enough to flick and whip, yet burly enough that you don't have to stress about what your landing looks like. The bike feels generous with its travel; dropping into rough, chunky terrain feels reassuring, and it isn't easily overwhelmed. The 4-bar rear end has been beefed up, but still benefits from the sensitivity of the Fox Float Factory shock. While there isn't anything revolutionary about the suspension design, it provides a balance of anti-rise and tunability that is hard to achieve with other designs.

In most of our discussion of the bike's downhill prowess, the motor plays a very small role. The M2S, however, offers so much punch and torque that you can simply erase the dead zones in a trail. A single pedal stroke can add enough speed to change your trajectory in a jump line. You can also adjust the speed limit from 20 to 28mph, but this adjustment must be made every time the bike powers on. The higher speed limit shouldn't be used on Class 1 trails, but we often jumped on the dirt bike trails, where the extra speed gave us the lift to clear bigger jumps.

Weighed with a 700Wh battery, tubeless tires, and no headlight, the PX Carbon Pro came in at 46 pounds, 5 ounces.

When we reviewed the PL, we wrote a section called “Would we change anything?” We wanted more braking power, a higher-rise handlebar, and a smaller rear wheel. Amflow delivered on all of those things and even gave us our new favorite tires. One of the things we didn't realize we wanted was the 38-tooth chainring they spec'd on the PX. Due to the bike's weight and, undoubtedly, its power, we found ourselves using only the bottom gears of the cassette. The bigger chainring on the PX lets us better utilize the middle cogs. So, what can we complain about now? Honestly, not much; we still haven't swapped out any of the parts on our test bike, that might be a first.

Climbing Performance

It would be easy to focus on the motor when we talk about climbing, since the M2S delivers a staggering amount of power. This gives you the ability to ascend a loose 14% grade at 26mph or punch the bike up a rock face that most riders call a “drop.” While we indeed had these experiences aboard the PX, we rarely used the bike's most powerful settings, instead relying on a slightly detuned Trail mode to tackle most of the climbs. The 78-degree seat tube angle puts you in a powerful position over the drivetrain; even on steep climbs, we had no trouble putting the power down and keeping the front end planted.

The PX doesn't feel radically different than any other 4-bar on the market, and that's a good thing. Critics call the design boring, but it's popular for a reason, and the custom-tuned Fox shock provides enough anti-squat to keep your all-out sprints pushing you forward rather than into the trail. With the motor turned off, the bike climbs incredibly well, using every bit of modern tech to provide traction and keep you in the power position.

And now for the motor… The Avinox M2S motor isn't just far more powerful; it is the smoothest, quietest, and most natural power plant we've ever tested. This can transform your climbs into high-adrenaline, top-of-the-berms, deep-lean descents that just happen to be going uphill. It also helps the bike feel much more natural at lower power settings. Our preferred setting was Trail mode, with power limited to 750W, torque to 80 Nm, and overrun turned all the way down. Now, these settings are firmly within reach of other e-mtb's on the market, but what makes the PX special? For starters, the bike is significantly lighter than almost every other model, making it more agile and natural feeling. Climbing back-to-back with the PX and Levo makes the Levo feel like driving a skid steer. With the PX in Trail mode, your power consumption decreases and your range increases. While this seems obvious, it also makes bikes like the Levo SL or Santa Cruz Heckler SL feel obsolete. You can tune the PX to those bikes' peak numbers and end up with a bike that weighs about the same but has more than 2X the range.

All of this power needs to be harnessed, and there are no better tires to secure your grip on the trail than the Schwalbe Gravity Pro Radials. Yes, we're gushing about the tires again… The Magic Mary, Albert combo is outrageously good. The choice of (heavy) Gravity casing tires is well received by more aggressive riders but might be overkill for casual riders. Riders that aren't smashing rock gardens at full tilt can easily save a pound of rotation weight without sacrificing much traction.

Power Output

We're not going to say that more power is necessarily better, but Avinox's ability to deliver more power with less weight and noise certainly is. 150 Nm of torque and 1,500 watts of power border on absurd. The sheer power of the Avinox motor feels similar to that of some new EVs, with performance numbers that completely dwarf what we thought was possible a decade ago. Having a car that sprints to 60mph in 3 seconds doesn't meet any practical need, but it's fun once in a while and shows off the company's command of the technology. It's a similar story with the M2S; we never really needed the highest power setting, but it was fun to occasionally leave your friends in the dust or climb “the impossible.” It also demonstrates Avinox's engineering prowess.

We only tried the Boost mode for kicks, but Avinox's ability to deliver that power from a lighterweight motor shows how far ahead of the competition they are. We spoke with many people on the trail and around the workbench while testing this bike, and power output was always a hot topic. We recommended the bike to countless people, and many were surprised to find out we didn't ride all the trails at full speed in Turbo mode. The real allure of this bike lies in how smooth and intuitive the motor feels, while being several pounds lighter than anything in its class. The PX is phenomenally capable and so much more fun than riding most full-power e-bikes weighing 50+ pounds.

The Avinox M2S comes with three hyper-adjustable ride modes: Eco, Trail, and Turbo. There is also a Boost setting that delivers maximum power and torque for 60 seconds, but takes quite the bite out of the battery. An Auto-mode is also available, letting the bike use its bevy of sensors to determine the level of assist it provides. We've been reluctant to let the bikes do too much “thinking” in the past, but Avinox's Auto mode is quite good, and while it sometimes provided more power than we needed, it never felt unnatural.

Range

To ensure a fair and precise range comparison across all the e-mtbs we test, we use a tightly controlled methodology to minimize the impact of external variables. Each test is conducted on the exact same course with the same rider (or a rider of identical weight), starting with a fully charged battery. We run the bike in its highest-assistance setting (which, for this test, meant keeping the Avinox motor in Turbo mode). To standardize rider effort, we use Garmin power meter pedals to maintain a steady input of roughly 100 watts (a light, easy pedaling effort just sufficient to engage the motor). Notably, the Avinox display also shows rider input that matched our Garmin numbers within 1%. Finally, we maintain standardized tire pressures and aim for consistent ambient temperatures across all runs.

Our tester made it 21.6 miles in Turbo mode while covering almost 4000' of elevation gain. This is about 23% less range than we got from the PL, likely due to the smaller battery, 27.5" rear wheel, heavier tires, and more potent output from the motor. We noticed less range in our day-to-day riding as well, but in practice, we rarely used the Turbo setting, which dramatically increased our range.

E-bike Controls

In the center of the top tube is a 2" OLED touchscreen that gives you full access to the bike's settings without needing to pull out your phone. Riders looking for total control can rejoice. This system is fully customizable, letting you add, remove, or reorder ride modes and fine-tune a wide array of performance variables for each mode. In each ride mode, you can adjust the minimum and maximum assistance levels, setting boundaries for the motor's support. You can cap the torque, adjust the level of continued assist the bike delivers, and dial in the exact overrun you want. Adjusting the continued assist lets you dictate how responsive the motor is to your input, while overrun refers to how responsive the motor is to your lack of input. More overrun means the bike will continue to provide power for a moment after you stop pedaling. This comes in handy on chunky climbs where you might not have the pedal clearance to pedal through a technical section.

The motor also has a few less-common adjustments, such as Quick-Start Assist. This bike uses gyroscopic sensors to detect when you're starting on a hill and delivers an extra surge of power to help you get started. A Smooth Shift Mode dips the power during shifts, allowing for crisp transitions and less wear on your drivetrain. Additionally, this mode lets you shift while coasting, so you can change gears without pedaling. The motor advances the chainring, independent of the cranks, letting the Transmission drivetrain do its thing in the background.

Another impressive feature, Heart-rate Linked Assistance, lets you connect a heart rate monitor strap and have the bike adjust power and torque to keep you in your desired heart rate zone. If you're pedaling hard and your heart rate rises, the bike simply increases the level of assist until you're back in your desired zone. This might sound complex, but it's a delightful way to ride while focusing on cardio fitness.

Traction Control? Yes, the Avinox motor uses traction control. Since the system uses a 42-point rear-wheel sensor, it can detect very small amounts of wheel slippage and instantly reduce power to help you maintain control. A bevy of sensors for torque, cadence, wheel speed, and even bike angle all feed into the motor's computer. These sensors are also used to prevent you from flipping over while doing a wheelie. These are the kinds of things that you don't really notice until they save you from a dramatic situation, keeping you on the bike instead of on the ground.

Two wireless two-button controllers sit just inside your grips, giving you control over assist modes on the left and display screens on the right. Each screen is fully customizable, letting you choose the data you want to see and the size and order in which it's shown. The Avinox system keeps your bike secure with built-in features such as passcode access, automatic Bluetooth proximity unlocking, and theft alerts for unusual movement. For advanced connectivity, adding a paid nano-SIM card enables real-time GPS tracking, out-of-range cloud data syncing, and the ability to remotely lock, unlock, or sound the bike's alarm directly from your phone.

Avinox's 700Wh battery uses a battery management system to maintain battery health regardless of your charging routine. The included 12-amp/508-watt fast charger charges the battery to 75% in just 90 minutes, and the pack is said to have the highest energy density on the market at 2.20Wh/Kg. Compared to the Gen 4 Levo's 1.91Wh/Kg, this is a dramatic difference, and helps account for the bike's slender downtube. The PX and PR can be used with an optional range extender, and it's huge! Packing 600Wh of juice, the unit looks like a second downtube, giving the bike an all-day power total of 1300Wh. The RS600 range extender weighs 6.5 pounds, adding considerable mass to the bike, but it's still notably lighter than our Specialized Levo Comp Carbon test bike with an 840Wh battery.

Build

The Amflow PX Carbon Pro and Amflow PX Carbon share the same platform, motor, battery, and controls. The extra $2200 dollars that you spend on the Pro model gets you:

-Fox Float X Factory shock instead of the Performance model.
-Fox Float 36 Factory with GRIP X2 damper, instead of the Performance model that uses the GRIP damper.
-SRAM XO AXS Wireless drivetrain, instead of the Eagle S100 (both are electronic)
-Amflox Carbon wheels instead of Almflow Alloy wheels,
-Amflow Enduro Carbon handlebars instead of Aluminum.

-Titanium saddle rails over steel.

The PX Pro model sells for $10,199, and the PX is $7999; neither bike is cheap, but Amflow is offering a ton of bike for the money. Legacy bike brands got greedy and complacent, offering top-trim bikes with lower performance and higher weights for $15,000-$20,000. Amflow undersells the included goods with the PX. While no one really cares if they send 4-wheel reflectors, the addition of the 1200 Lumen Avinox headlight, Fox fender, and Schwalbe Clik Valves adds value.

Should You Buy the Amflow PX Carbon Pro?

Here's a hot take. If you don't have experience riding a mountain bike and have some fairly developed handling skills, much of this bike could be lost on you. Not only that, but you might be tempted to ride the bike in an unsafe way. I remember reading that when the Kawasaki Ninja was released in 1984, the bike averaged around 1000 miles before being totaled. While I can't confirm that, it checks out anecdotally: the Ninja was much faster than its predecessors and brought many new users into the sport. There are many new riders using e-mtbs to explore mountain biking, and this bike, for all its merits, is a poor fit for someone new to the sport. With that out of the way, this is the funnest mountain bike I've ever ridden. The dizzying power delivery, phenomenal suspension, and burly capabilities make this a bike that finds your limits, not its own. We've been riding e-mtb's since laying eyes on the first Specialized Levo in 2016, and during the past decade, we've ridden every powertrain on the market. Nothing comes close to the Avinox powertrain. So, should you buy this bike? We can't say if it's the right bike for you, but we certainly wouldn't be investing in any other motor system in 2026.

What Other Electric Mountain Bike Should You Consider?

Following up on the above statement, if the Amflow doesn't have the geometry, suspension layout, or color you'd prefer, we'd recommend considering one of the other 20 or so brands that now use the Avinox M2S motor. If you're new to the sport or would like to spend less, have a look at the Aventon Current REC or Aventon Current EXP. These bikes are incredible values with modern geometry and all the features to help you make the most of your ride.