Product News / E-MTB: In most cases, updates for e-bike drive systems contain only minor improvements, perhaps a new feature. But the update, available now (as of February 17, 2026) for the Specialized 3.1 drives, delivers more: With significantly more power, a revised walk assist function, a refined Micro Tune, and various detailed improvements to responsiveness, the Californians have put together a comprehensive package that should noticeably sharpen the character of the Levo 4. We've taken a closer look at the details of updates 1.D.4 (motor) and 19.3.7 (display) and have also gathered some initial riding impressions.
The new update is available for all models in the Turbo Levo 4 family equipped with the Specialized 3.1 motor and the MasterMind T3 display. Specialized utilizes the hardware's reserves to significantly increase peak mechanical performance via a software update.
The most important innovations at a glance
Engine (Firmware 1.D.4)
S-Works 3.1 Engine: 850 W Peak Power (+18%), 111 Nm (unchanged).
Standard 3.1 engine: 810 W peak power (+22%), 105 Nm torque (+4%).
Micro Tune: Adjustable in 10% increments from 100–400% support.
Driving experience: Smoother speed limiter cut-off at 25 km/h, improved responsiveness.
Bug Fixes: 1:1 translation errors and traction loss dropouts have been fixed.
Display (Firmware 19.3.7)
Walk Assist: Three new modes (Walk+, Walk, Walk-) with up to 80 Nm.
Auto Mode: New positioning between OFF and ECO.
Display: Fix for "Max Speed" display.
Power boost: Up to 850 watts peak power
The highlight of the update is undoubtedly the increase in "peak power". Specialized continues to differentiate between the standard 3.1 motor and the S-Works version in this regard.
Owners of the S-Works Levo 4 can look forward to a substantial 18 percent increase in peak mechanical power. After the update, the motor delivers up to 850 watts to the crankshaft. It's important to note that the maximum torque remains at the familiar 111 Nm. What does this mean in practice on the trail? Since the torque remains the same, the initial acceleration from a standstill at low cadence won't change drastically. However, the 850 watts of peak power means the motor can maintain this torque for longer, even at higher cadences. Especially on steep, technical climbs where a high cadence is required, the motor should feel more responsive and powerful without running out of steam at higher cadence.
The leap is even more pronounced with the Standard 3.1 motor. Here, Specialized increases the torque to 105 Nm and boosts the peak mechanical power by a remarkable 22 percent to 810 watts. This brings the Standard and S-Works models closer together in terms of performance, although the top-of-the-line model still holds the edge.
Specialized points out, however, that this increase in performance comes with physical consequences: those who constantly use the new maximum power output will notice a reduction in range. You can't cheat physics – more watts consume more energy. Those who want to ride their usual routes should take this into account when adjusting the assistance levels.
Dynamic Micro Tune: Precision instead of chance
In addition to raw power, the update also focuses on fine-tuning. The familiar "Dynamic Micro Tune" function has been fundamentally redesigned and should be a boon for riders who like to have complete control over their power output. Previously, the increments were often difficult to discern. With the new firmware, Specialized has opted for linear, predictable steps. The assist level can now be adjusted in 10% increments from 100% to 400%.
Why is this relevant? Because it improves the predictability of the engine. An example from the new data for the S-Works engine illustrates this:
In the 100/100 setting (Ease/Motor Power), the rider needs approximately 213 watts of power to access full motor assistance. This corresponds to about a quarter of the maximum 850 watts. Reducing the setting to 50/100 requires the rider to contribute 425 watts to push the motor to its limit.
This linearity is incredibly helpful when riding in a group with riders of varying abilities or on different bikes. You can precisely "tune" the assistance to perfectly match your fitness level or the terrain. Low settings promote fitness and conserve battery on flat sections, while high settings (up to 400% support factor) smooth out even the steepest climbs. The support factor table is now logically structured: each 10% increment adds a consistent boost. This eliminates the guesswork about how much "more" the next click on the handlebars will actually deliver.
New push assist: Three gears for all situations
One feature that is often neglected, but can easily determine whether you're frustrated or delighted, is the Walk Assist. Here too, the developers have listened to community feedback and significantly expanded the function in the "Motor Tune" menu on the MasterMind T3 display.
Instead of a single speed, there are now three selectable modes for the push assist:
WALK+ (5,0 km/h, 80 Nm): This is the mode for rough terrain. If the trail is so steep and rocky that riding becomes impossible, or if the bike is heavily loaded, the high torque of 80 Nm helps to push the bike uphill almost on its own. 5 km/h is a brisk walking pace.
WALK (4,0 km/h, 70 Nm): The new standard for moderate inclines. A balance of speed and power.
WALK- (3,0 km/h, 55 Nm): Ideal for flat terrain or situations where precise maneuvering is required and the bike should not "jump away".
An interesting side note: Specialized deliberately limits the speed to 5,0 km/h (approx. 3,1 mph), even though up to 6 km/h would be legally permitted. The reasoning is plausible: Higher speeds make the bike difficult to control on rough terrain.
Driving experience and display optimizations
It's not always the big numbers that improve the driving experience. Often it's the subtle nuances in the software tuning. Update 1.D.4 addresses precisely these subtleties.
The way the assistance fades out at the 25 km/h limit has been revised. The notorious "hitting the wall" sensation when the motor abruptly cuts out should now be a thing of the past. The transition between motor support and pure muscle power is now smoother and more natural. This should make for a significantly more pleasant riding experience, especially on flat sections.
Responsiveness has also been optimized, particularly during the so-called "overrun" (follow-up phase). The goal: smoother transitions and more precise support when the cadence suddenly changes.
On the display side (firmware 19.3.7), there's also a logical adjustment: The AUTO mode has been moved. It's now intuitively located between OFF and ECO. This makes sense, as many riders use AUTO mode as a "set-and-forget" setting before switching to the more powerful modes. The ECO, TRAIL, and TURBO modes remain together as a core group. For those who want to quickly switch from AUTO to maximum power, Specialized offers a tip: Simply configure ECO to 100/100 – this jumps directly to full power. Alternatively, the "AUTO+" setting is available, which generally provides more support than the standard AUTO mode.
Bug Fixes: No More Teething Problems
A look at the "Bug Fixes" section of the update reveals that Specialized has also cleaned up deep within the system. Some of the fixed bugs are quite specific, but they demonstrate a thorough analysis of various usage scenarios.
Of particular technical interest is the fix for the "1:1 Gear Ratio Error." Previously, the motor could throw an error message if the rider maintained a constant cadence for an extended period (over 10 seconds) in a 1:1 gear ratio. This could happen, for example, when using a 32-tooth chainring at the front and the rear sprocket on the 32-tooth cog (often 4th gear on a 10-52 cassette). This error has been eliminated.
Other resolved issues include:
Power loss during light pedaling: In situations with minimal pedal pressure (e.g., when turning on narrow paths), the assistance could cut out and only return after the pedals came to a complete stop. This has been fixed.
Loss of traction: If the rear wheel briefly spun or lost contact with the ground (e.g., when rolling over a water channel uphill), the system would cut out. The motor should now provide constant power in these situations as well.
Range Extender Logic: A bug that reduced motor power even when the internal battery was fuller than the range extender has been corrected.
Display bugs: A frozen "Max Speed" value of zero and problems switching screens via remote button are also a thing of the past.
First impressions from practice
We were able to extensively test the update several weeks before its official release on a Levo 4 Pro and a Levo with an S-Works motor. The most noticeable improvement, especially on the non-S-Works version, is the increased power: the motor provides a strong boost, even at low cadences, and continues to pull with considerable power at higher pedal strokes. As the new performance figures already suggest, the gap to the S-Works motor has narrowed with the update. However, with the latter, the higher torque is still particularly noticeable – for example, when you have to get out of the saddle on steep climbs.
The many other improvements take a backseat to the increased performance – not because the riding experience isn't less important, but because the Specialized 3.1 drive system has been among the best on the market in this respect since its introduction last year. However, the fact that the natural support characteristics and very smooth power delivery have been maintained despite the significantly higher output is truly commendable.
We are currently working intensively on testing both engines – the S-Works and the regular version – on the test bench. As soon as we have the relevant data, we will link it here in this article.
A must-have for Levo 4 drivers
The update package that Specialized has put together here is remarkable. It's rare for an existing bike to become noticeably more powerful over its lifespan. The combination of up to 850 watts of peak power and the numerous detailed improvements significantly enhances the drive system and the entire bike.
The installation process is incredibly simple and user-friendly: The update can be installed "over-the-air" (OTA) directly onto the bike via the Specialized app. A visit to the dealer is not strictly necessary, but of course possible if you are unsure or prefer not to use the app.
For owners of a Levo 4 with the 3.1 motor, this update is a must-download. It costs nothing but offers clear advantages in almost every aspect – from raw power to usability.