It’s always wild to see how some e-bike manufacturers go out of their way to play hide-and-seek with their motor specs. More often than not, they hide behind the classic "custom-built to our specs" label. Other times, they treat it like a minor oversight—even though they’re withholding data that’s absolutely critical to making an informed purchase. Let’s be real: a lot of brands looking to capitalize on a "locally designed" image conveniently "forget" to credit their powertrain supplier. But in today’s market, transparency is a major selling point. In fact, I’ve already had to dig deep before to figure out which motor brand was integrated into an e-bike’s design.

And that’s where I have to give credit where credit is due. While combing through the user manual, a major discrepancy jumped out at me—ultra-specific technical details that hadn’t popped up in any of my previous reviews. I fed those raw numbers into the AI, and it cracked the case almost instantly. It immediately flagged a proprietary tech signature exclusive to just one manufacturer in the world...

The Bastille E relies on a remarkably simple mechanical and electrical system to switch between modes:

• To activate the motor: The protective cap on the rear hub must be fully screwed onto its mount. This action is what engages the motor and triggers the electric assistance.

• To switch to "pedal-only" mode: Just unscrew this cap (or turn off the assistance via the app).

As soon as the cap is unscrewed, the circuit opens and the motor is completely deactivated. Thanks to the freewheel system built into the rear hub, the motor creates absolutely no friction or magnetic drag on the axle.

The Bastille E then transforms into a perfectly classic, smooth single-speed analog bike. It’s the perfect way to keep riding effortlessly if the battery is completely dead, or if you just want to pedal under your own power.

If you’ve read our piece on the Lemmo ONE MK2 and its Dual Mode Hub, you might think these two setups are identical. But while both systems feature a "cap" on the rear axle, their patents, mechanics, and goals are worlds apart. They are both engineering masterpieces, but they serve entirely different purposes.

Here are the fundamental differences between the Zehus (Bastille) and Lemmo hubs:

1. The "Cap": Electronic (Zehus) vs. Mechanical (Lemmo)

• Zehus (Bastille E): The cap acts as an electronic switch and a dust cover for the charging port. Once screwed in, it completes the circuit and powers up the system. There is absolutely no mechanical impact on the gears. When riding without assistance (with the cap unscrewed), you will experience a slight drag from natural magnetic resistance (motor cogging).

• Lemmo: The cap is a mechanical clutch. When removed and rotated 90 degrees, it physically disconnects the gears (the planetary gear reduction system) from the motor casing. The hub becomes a true freewheel, turning the e-bike into a traditional analog bicycle with zero resistance—saving those famous 10 watts. This manual mechanical clutch is exactly what Lemmo patented.

2. Architecture: All-In-One (Zehus) vs. External Battery (Lemmo)

• Zehus (Bastille E): The hub is a total black box. It houses the motor, the controller, the sensors, AND the battery. This "all-in-one in the wheel" concept is Zehus’s claim to fame.

• Lemmo: The hub only contains the motor and the sensor. The battery, the brains, and the connectivity live inside the "Smartpac"—the removable pack that clips onto the Lemmo's frame.

3. Sensors: Inclinometer (Zehus) vs. True Torque Sensor (Lemmo)

• Lemmo managed to integrate a torque sensor directly inside the rear hub, whereas most brands place it in the bottom bracket. As a result, the Lemmo measures the actual force you put into the chain or belt.

• Zehus (Bastille E) does not have a torque sensor. Instead, it relies on analyzing rotation speed and the bike's incline to "guess" how much effort you're putting in.

All in all, the Bastille E is an incredible statement piece for minimalist urban transit . By keeping the handlebars completely free of displays and running a clean, grease-free Gates Carbon Drive belt, it delivers a wonderfully quiet ride that looks like a high-end analog single-speed . For a sporty, minimalist citadin looking to satisfy strict anti-theft insurance criteria—avoiding leaving a premium bike exposed outside all night by easily tracking this lightweight 16.7 kg rig straight into a small apartment—Gilles Henry's folding architecture shines as a stellar multimodal, "last-metro" solution .

But let's be entirely objective—this machine has an incredibly narrow comfort zone . With a modest 25 Nm of torque paired to an inclination algorithm, this bike is strictly built for flat city avenues, relying heavily on smooth human-powered, single-speed adaptability rather than conquering steep terrain . If you live in a hilly area, you will be doing a massive amount of the heavy lifting yourself .

Furthermore, you have to get used to its highly unique engineering quirks . The technical manual explicitly mandates a strict "No-Braking" rule while pedaling . Because the system lacks a mechanical crank torque sensor, the software algorithm gets deeply confused if you feed it conflicting data—like pushing on the pedals while simultaneously pulling the hydraulic brake levers—and will immediately force the motor into a safety lock-out mode . You also need to keep an eye on your range; once the internal battery depletes to its 20% survival mode, the hub aggressively steps down its power distribution to protect its cells, resulting in very noticeable power cutouts . Lastly, pay strict attention to the mechanical folding protocol: never attempt to roll or pull the bike backward when it is parked with the saddle fully lowered, or you risk permanently snapping the proprietary internal crankset pedal lock .

Ultimately, the simplified, low-feature mobile application aligns perfectly with this distraction-free digital ecosystem . If you can work around those boundaries, the tradeoffs make total sense for a premium, transportable rolling origami . It leaves us with one final marketing truth for modern micromobility: in a crowded concrete jungle, absolute visual stealth might just be the ultimate anti-theft superpower .

Mini-J