Aventon Ultro X
Having cemented its position in the core US market years ago, Aventon is finally making the leap to Europe in 2026. They aren't just bringing a new lineup of e-bikes across the pond; they’re also introducing their own proprietary drive system, dubbed "Ultro". While the actual motor hardware is sourced from Gobao, Aventon brings a lot to the table, providing the batteries, chargers, displays, sensors, the companion app, and—most importantly—the software tuning. The flagship Ultro X motor, which is based on the Gobao P120, packs a serious punch and delivers impressive efficiency, especially considering it runs on a "mere" 36V architecture. Its only real drawback? It is a bit on the loud side.
Battery System & Chargers
🔋 Battery System
| Model | Capacity | Weight | Energy Density | Dimensions | Mounting |
|---|---|---|---|---|---|
| Aventon 800 | 800 Wh | 4.15 kg | 193 Wh/kg | n/a | Internal |
🔌 Chargers
| Model | Current | Dimensions |
|---|---|---|
| Standard Chager | 4 A | n/a |
Power Characteristics
Shows how much power the motor delivers for a given rider input. The value shown is pure motor power, adjusted for input and drivetrain losses.
Input vs. Output: Aventon Ultro X
When it comes to mapping the Ultro X, Aventon isn't afraid to chart its own course. The Turbo mode features the steepest progression curve we’ve ever measured, with the assistance factor scaling seamlessly from around 100% all the way up to 500%, depending on rider input. The result is highly dynamic power delivery—you get massive thrust, yet it remains incredibly easy to modulate on the trail.
Unterstützungsstufen
Comparison of different assistance modes (e.g. Eco, Trail, Turbo).
Profile: Aventon Ultro X
Aventon clearly prioritized fine-tuning the motor's assistance modes, and rightly so: it genuinely feels like you’re getting two motors in one. While Turbo mode shines with an incredibly dynamic ride feel, the Trail and Eco modes are mapped to be less progressive, focusing heavily on a natural pedaling sensation. On the other end of the spectrum is the time-limited Boost mode, which goes absolutely flat out—delivering the motor's peak output even if you’re barely putting any effort into the pedals.
Cadence Behavior
Shows the optimal RPM range.
Power vs. Cadence (Relative (%))
The Ultro X doesn't drop the ball when it comes to cadence, either. It hits peak power at a relatively sluggish 70 rpm, and from there, the output stays remarkably consistent. We only noticed a slight drop-off starting at around 110 rpm, but even at those higher cadences, there's no noticeable dead spot in the power delivery.
Thermal Performance
Shows power output performance over 15/20 minutes under constant full load.
20 min
But the real standout feature of the Ultro X is its thermal performance. Despite its high output, power drops by less than 5% even after a relentless 20-minute effort. No other motor in this class can match that. What’s fascinating is that the motor's outer casing stays relatively cool, peaking at under 75°C. It looks like Gobao has really done its homework on the hardware side, too. Hats off to them.