Avinox MG Gearbox Motor Prototype: A New Era for Drivetrains?

After introducing the M2S and M2 motors, Avinox has now made a striking announcement at EUROBIKE 2026 with the unveiling of the Avinox MG Concept. This innovative drive system uniquely integrates the motor and gearbox into a single unit, aiming to enhance the riding experience with smoother transitions, lower maintenance needs, and a novel approach to power delivery in e-mountain biking.

Currently, the MG Concept is still in its prototype phase. However, its debut at EUROBIKE 2026 suggests a significant shift in the future of e-bike technology. This unveiling also indicates Avinox's determination to compete in the evolving e-bike drive system market, especially with the presence of rival Chinese manufacturer Gobao, who showcased their E-CVT gearbox motor nearby. Notably, Gobao has reportedly hired several former Avinox employees. By introducing the MG early, Avinox signals its commitment to maintain a competitive edge in this rapidly changing landscape. Meanwhile, many manufacturers are still awaiting deliveries of the M2 and M2S models, which raises concerns about the impact of Avinox's rapid development on dealers and sales teams.

Understanding E-CVT Motors

To grasp the significance of the Avinox motor, it's essential to understand the E-CVT (Electronic Continuously Variable Transmission) system. This technology merges an e-bike motor with an electronically regulated, continuously variable transmission. Unlike traditional derailleur or gearbox systems, E-CVTs do not have fixed gears; instead, they adjust the gear ratio fluidly based on factors like speed, incline, and pedal cadence.
This results in smooth transitions throughout the entire gear range without the jarring shifts typical of conventional systems. Riders experience what feels like an infinite number of gears. Most E-CVT systems also feature automatic shifting, handling gear changes autonomously.
In units like the Owuru Gearbox, Avinox MG, and Gobao X1P, a planetary gearbox with dual electric motors operates within the system. One motor fine-tunes the gear ratio, affecting the ease of pedaling, while the other manages motor assistance, optimizing both gear ratio and power output for various riding conditions.

Critiques of E-CVT systems often focus less on the mechanical aspects and more on electronic calibration, potential efficiency losses, and system responsiveness during engagement and acceleration.

Achieving a Natural Ride Feel with Continuous Variable Transmission

Avinox's primary aim with the MG Concept is to provide an exceptionally natural ride experience. The system is designed to maintain a steady cadence across all gears while dynamically adjusting the transmission ratio to match the riding scenario.
Whether navigating steep inclines, flowing trails, or fast sections, the rider's preferred cadence is intended to remain stable. Avinox asserts that this results in a remarkably smooth and natural riding experience, as both the assistance level and transmission ratio adapt seamlessly to the situation.

Seamless Shifting with Continuous Power Delivery

A key feature of the MG Concept is its shifting performance. Unlike traditional drivetrains that may experience temporary power interruptions during gear changes, the MG is designed to modify the transmission ratio without fixed shifts.

Trade show visuals indicate a shift time of under 0.1 seconds while maintaining consistent torque throughout the change. This ensures that propulsion remains smooth and steady, even under load. Avinox claims that ratio adjustments can occur with the motor assistance turned off, while stationary, and even under loads of up to 300 Nm.

Furthermore, the MG Concept boasts a gear range of up to 520%, placing it on par with current 12-speed systems from SRAM (520%) and Shimano (510%).
Avinox also hints at customizable transmission profiles, featuring both automatic and manual shifting modes, though details on the extent of this customization are still pending.

Reduced Maintenance and Increased Longevity?

Avinox is making bold claims regarding the durability of the MG Concept. The full integration of the drivetrain is said to eliminate many traditional wear components or significantly reduce their stress.

Graphics presented at the exhibition suggest that the MG Concept could offer up to three times the durability and a 10% boost in efficiency compared to conventional systems. However, Avinox has yet to clarify how these figures were derived or under what conditions they apply.

The integration of the motor and gearbox is also expected to introduce additional features, including a mechanical motor lock and an electric reverse-assist function. Another graphic hints at a potential charging feature while riding, though specifics on its functionality or energy recuperation capabilities remain undisclosed.

While initial testing of the Avinox drive system has taken place, insights into its performance are still under wraps.

Prototypes of Avinox MG Already Spotted

Even though the MG gearbox motor is currently a concept, its development appears to be progressing rapidly. At EUROBIKE, prototypes from brands like Canyon, Mondraker, and Commencal were observed, indicating strong confidence in the Avinox MG E-CVT gearbox motor's potential for trail-ready performance.

Avinox has indicated that the MG Concept is not limited to e-mountain bikes; the manufacturer also sees applications in trekking, SUV, gravel, city, and cargo bikes. Specifics about power output, torque, weight, or a launch date have yet to be revealed. What is evident is that while many manufacturers are refining existing technologies, Avinox is challenging the very foundations of eMTB drivetrains. This move not only puts pressure on rival motor manufacturers but also on industry giants like Shimano and SRAM. Such a challenge is long overdue, as traditional derailleur systems were never designed to withstand the torque and sustained loads of modern e-bikes, leading to issues with wear and durability.