e-bike motor

E-Bike Motor: What do you know?

Are you curious about what powers your electric bike and how it enhances your riding experience? E-bike motors are the heart of electric bicycles, providing the necessary boost that transforms a regular bike into a high-performance machine. In this blog post, we will delve into the different types of e-bike motor, their working principles, and how to choose the right one for your needs.

Types of E-Bike Motors

Electric bike electric motors are the crucial components that provide the power and speed necessary for an enjoyable and efficient ride. There are several types of e-bike motors, each with unique characteristics and benefits. Understanding these differences can help you choose the best motor for your needs. In this section, we will explore hub motors, mid-drive motors, and the distinctions between geared and gearless motors.

Hub Motors

Wheel Hub motors are the most common type of ebike motor. These motors are integrated into the hub of either the front or rear wheel. When you pedal, the motor engages and provides additional power, making it easier to ride uphill or against strong winds. Hub motors are relatively simple in design, which makes them reliable and easy to maintain.

Advantages and Disadvantages

One of the main advantages of hub motors is their ease of installation. They can be added to most bikes without significant modifications. Hub motors are also known for their durability and low maintenance requirements.

The other advantages of hub motors is cost of hub motor is lower. E-bike wheel hub motors are available in 8-inch, 10-inch, 11-inch, and 12-inch sizes, with corresponding motor powers of 350W-2000W and prices ranging from 100-400 yuan.

In addition, for a 1000W wheel hub motor and a mid-mounted motor, with the same battery, the comprehensive cruising range of the wheel hub motor is 20-30% higher than that of the mid-mounted motor.

However, hub motors generally offer less torque compared to mid-drive motors, which can impact performance on steep hills.

electric bike hub motor

Mid-Drive Motors

The mid-drive motors are located in the center of the bike, near the pedals. This positioning allows the motor to leverage the bike’s gears, providing a more natural and efficient riding experience. Mid-drive motors are known for their superior torque and power, making them ideal for challenging terrains and long-distance rides.

Advantages and Disadvantages

In terms of power output, the mid-mounted motor has obvious advantages, and its conversion rate is over 80%.

The mid-mounted motor has large torque, fast acceleration response, and strong explosive power. It is suitable for high-performance electric motorcycles with a maximum speed of over 80km/h.

In addition, the mid-mounted motor has good heat dissipation performance, which can effectively reduce the temperature of the motor during operation and extend its service life.

But relatively speaking, the price of the mid-mounted motor is relatively expensive.

electric bike mid drive motor

Geared vs. Gearless Motors

Both hub and mid-drive motors can be either geared or gearless. Geared motors have internal gears that increase torque and efficiency, making them better suited for hilly terrain and heavier loads. Gearless motors, on the other hand, have fewer moving parts, which makes them more reliable and quieter, but they usually offer less torque.

Geared motors are ideal for riders who need extra power for climbing hills or carrying heavy loads. They provide better acceleration and are generally more efficient in varied conditions. However, the internal gears can wear out over time, requiring more frequent maintenance. Gearless motors are well-suited for riders who prioritize reliability and low maintenance. They are perfect for flat terrain and urban commuting, where high torque is less critical.

How E-Bike Motors Work

An electric bike motor operates by converting electrical energy from the battery into mechanical energy that propels the bike. This process involves several key components working together seamlessly to enhance your ride.

Basic Working Principles

At the core, an e-bike motor uses a controller to manage the power flow from the battery to the motor. When you pedal or use the throttle, the controller sends a signal to the motor, which then engages and provides the necessary boost. The motor’s rotor spins, creating rotational force that drives the wheel.

Key Components

The primary components include the battery, controller, and motor itself. The battery supplies the electrical energy, while the controller regulates the power output based on your input. The motor, which can be either a hub or mid-drive, converts this electrical energy into mechanical movement, enhancing your pedaling effort and allowing you to ride farther and faster with less effort.

e-bike motor work

How to Manufacture E-Bike Motors

Motor Design

Our Engineers create detailed schematics and 3D models of the e-bike motor, considering factors such as efficiency, size, and weight. The design includes components like the stator&rotor, windings, and housing. Computer simulations test the motor’s performance under various conditions, ensuring it meets specifications.

Material Selection

Common materials include electrical steel for the stator and rotor, copper wire for stator windings, magnetic steel for the rotor, and aluminum for the housing.

Stator and Rotor Production

Electric bicycle motor stator and rotor lamination employ progressive stamping or helical stamping to manufacture. Our motor lamination stacking through interlocking, welding, glue bonding, and Backlack methods to stack complete cores. Motor Stator winding involves winding copper coils around them. The rotor rotates to create mechanical motion and is produced by die casting or CNC machining.


Once the stator and rotor are prepared, they are assembled along with other components such as bearings, shafts, and housing. Lamnow’ assembly process requires precision to maintain tight tolerances, ensuring smooth operation and minimal noise. Our automated machinery often aids in this step to enhance accuracy and efficiency.

e-bike motor manufacture

Choosing the Right E-Bike Motor

Terrain Factors

First, consider the terrain you’ll be navigating. If you frequently ride on hilly or uneven ground, a mid-drive motor might be ideal due to its superior torque and ability to leverage the bike’s gears. For flatter, urban environments, a hub motor could suffice, offering simplicity and ease of use.

Power Ratings and Battery Compatibility

Generally, the motor power is 250W, 500w, 750W, and 1000W. Different countries and regions have different requirements for the rated power of electric-assisted bicycles. For example, the rated power of the EU standard cannot be higher than 250W, while in some areas of the United States, this standard will be relaxed to 750W. In China, electric-assisted bicycles are included in the category of electric vehicles, and the new national standard stipulates that the rated power cannot exceed 400W.

Higher wattage motors provide more power but may drain the battery faster. Therefore, balancing power and battery life is crucial. Ensure the motor is compatible with your e-bike’s battery to maximize range and performance.

Usage and Rider Weight

Additionally, think about your usage and weight. Heavier riders or those carrying extra loads might benefit from a more powerful motor.

By considering these factors, you can choose an electric bike motor that delivers a smooth, efficient, and enjoyable ride tailored to your specific requirements.

choose e-bike motor


How fast can e-bikes go with different motors?

The speed of an e-bike depends on the motor’s power and the bike’s overall design. Generally, e-bikes with 250W motors can reach speeds up to 20 mph, while those with 500W or 750W motors can achieve speeds of 25-28 mph.

What is the difference between a hub motor and a mid-drive motor?

Hub motors are located in the wheel hub, providing propulsion directly to the wheel, while mid-drive motors are positioned near the bike’s crankset, driving the chain for more efficient power transfer. Hub motors are simpler and easier to install, whereas mid-drive motors offer better performance on varied terrain and more balanced weight distribution.


In exploring e-bike motors, we see their critical role in enhancing electric bicycles’ performance and efficiency. From understanding different motor types to knowing how they work and choosing the right one, this knowledge empowers you to make informed decisions. Whether you prefer the simplicity of hub motors or the superior torque of mid-drive systems, selecting the right motor tailored to your needs ensures an optimized riding experience.

Lamnow is a professional electric bicycle motor China manufacturer, including stator rotor stacks, stator winding, motor components assembly, etc.  Our advanced automation equipment ensures lead time quickly. Contact us to customize the motor for your E-bike.

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