Ultro X Deep Dive with Velomotion
June 5, 2026
The Aventon Ultro X: A Closer Look at the Motor Built for the Long Way Up
The video below comes from Velomotion, one of our trusted partners in the EU, who took the Ultro X for an honest, hands-on look, both on the test stand and out on the trail. We're grateful to them for such a thorough deep dive, and we wanted to walk through it here with our own notes on what's happening inside the motor. Give it a watch, then read on.
There's a moment on every long climb where you're truly tested: lungs, legs, and motor. The Ultro X was built for that moment.
That breakdown, which measures what the motor actually delivers, then demonstrates how the power lands on the trail, confirms what we set out to build: a mid-drive that does its work quietly, delivers power where the climb gets steep, and lets you shape the ride to your own legs.
Here's a closer look at what's going on inside the Ultro X, and why the Aventon app is the part of the story that makes it yours.
WHAT THE ULTRO X IS MADE TO DO
The Ultro X is our full-power mid-drive motor, built for the trail and carried on the Aventon Current. Putting the motor at the cranks instead of the rear hub changes how the whole bike feels. Power arrives where you pedal, low and centered, so the bike stays planted through adverse terrain.
The difference you feel most is the torque sensor. It reads how hard you push and answers in kind — no surge, no lag, no sudden shove when you ease off. Push harder and it gives more. Soft-pedal through a rock garden and it settles right back. You're still the engine. The Ultro X just makes your legs go further.
It's compact for what it does, too: roughly 6.3 lbs, sealed to an IP67 rating. Whether it be river crossings, dust, a winter of wet fire roads — it's made to last through the conditions you actually ride in.
POWER THAT HOLDS WHEN THE CLIMB DOESN'T LET UP
Numbers matter most when they describe something you can feel. On the Ultro X, they describe a climb that keeps going.
In its standard tune, the motor delivers up to 110 Nm of torque and 750 watts of peak power, with up to 400% assist. That's enough to turn a wall-of-a-fire road into a steady, sit-and-spin rhythm.
When the grade really stands up, there's Boost Mode. One tap takes you to 120 Nm, 850 watts, and up to 500% assist for a 30-second surge. Although there is a cooldown period for the motor between uses, Boost Mode provides extra power at the touch of a button.
Feeding it all is an 800Wh battery, integrated into the frame and good for up to 105 miles of range, depending on terrain, assist level, and how hard you ride. Run it down, and a 4A charger brings it back from empty in about six hours. Charge overnight, ride all day.
FIVE MODES, ONE HONEST FEEL
The Ultro X gives you five ways to ride: Auto, Eco, Trail, Turbo, and Boost.
Auto reads your effort and the terrain and blends the assist for you, so you can stop thinking about modes and watch the trail. Eco stretches a long day into a longer one. Trail and Turbo step up the punch for the climbs and the chunder. Boost is there for the pitches that ask for everything.
What ties them together is that torque sensor in the mid-drive unit. Across every mode, the power stays predictable and earned — the bike responds to your legs instead of a cadence threshold. The result feels less like a motor switching on and more like a strong day in the saddle.
MAKE IT YOURS IN THE AVENTON APP
A motor is only half of it. The other half is control — and that lives in the Aventon app.
The Ultro X was built to be tuned, and the app is where you do it. With Ride Tune, you shape the character of each mode to your own riding: how sharply the motor responds, how much it gives, even the motor overrun — how long power carries after you stop pedaling — set as a simple percentage. A rider who wants an instant, snappy hit and one who wants a smooth, measured build can ride the same bike, each set up to feel like it was made for them.
Beyond tuning, the app is where the ride comes together. You get expanded ride data to look back on, automatic lights, and customizable Auto Mode. Because updates arrive Over-The-Air, the bike keeps getting better after it's yours — recent firmware has added Cruise Control, Hold Mode, a sensor switch, and trail-minded tools like Wheel Lift Control and Jump Tracking. There's even Action Camera Control, so a compatible GoPro or DJI camera pairs over Bluetooth and starts recording from the control pod. Hands on the bars, eyes on the trail.
In other words, the Ultro X isn't a fixed spec sheet. It's a platform that grows with you and with every update.
RIDE IT YOUR WAY
The deep dive put it plainly: the Ultro X has the torque, the range, and the quiet, natural feel to take on the kind of terrain that used to turn you around — and the Aventon app hands you the controls to tune all of it to your own legs.
That's the whole idea. Capable power, made personal, ready when you are. It's a big world out there.
Explore the full Ultro X build and specs on the Aventon Current page, and download the Aventon app to start tuning your ride.
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