Comprehensive Review of Second-Tier Chinese Mid-Drive Motors

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Besides Bafang, some Chinese manufacturers offer mid-drive electric bike motors. This blog post will review the second-tier Chinese mid-drive motors, Dapu, Shengyi, and Tongsheng.

 

dapu 250w

 

Dapu 250W MD250 Mid Drive Motor Review


If you are looking for a robust and reliable mid-drive motor for your electric bike, consider the Dapu 250W MD250. This motor is one of the most popular choices among e-bike enthusiasts, and for a good reason. 

 

Features of Dapu MD250

The Dapu MD250 is a brushless DC motor that can deliver up to 250 watts of nominal power and 500 watts of peak power. It has a torque sensor that measures the pedaling force and adjusts the power output accordingly. This makes the riding experience smooth, natural, efficient, and safe.

 

The motor has a compact and lightweight design, weighing only 3.8 kg. It can fit most standard bike frames with a 68 mm or 73 mm bottom bracket. The installation is relatively easy if you have the right tools and skills. Depending on your preference and terrain, you can also choose from chainring sizes, 32T to 48 T.

 

The motor has a color LCD that shows various information such as speed, battery level, assist level, odometer, trip distance, etc. The display also has a USB port to charge your phone or other devices. The motor has five levels of pedal assist plus a throttle mode that can be activated by pressing a button on the handlebar.

 

Performance of Dapu MD250

The Dapu MD250 mid-drive motor is a powerful and responsive motor that can handle different terrains and conditions. It can easily climb steep hills thanks to its high torque output and torque sensor. It can also reach up to 25 km/h (or more if you unlock it), depending on the battery voltage and gear ratio.

 

The motor is also quiet and smooth, with minimal noise and vibration. It does not interfere with the bike’s handling or balance, as it is at its center. It also has a freewheel mechanism that allows you to pedal without resistance when the motor is off.

 

The motor is compatible with various types of batteries, from 36V to 48V and from 10Ah to 17Ah. The battery life depends on many factors, such as the assist level, speed, terrain, rider weight, etc. But generally speaking, you can expect to get around 50 km to 100 km of range per charge.

 

Pros and Cons of Dapu MD250

The Dapu MD250 mid-drive motor has many advantages over other engines, such as hub motors or friction motors. Some of the pros are:

  • High power and torque output
  • Smooth and natural pedaling feel
  • High efficiency and battery life
  • Low noise and vibration
  • Good balance and handling
  • Easy installation and maintenance
  • Compatible with various batteries and chainrings
  • Color LCD with USB port
  • Throttle mode option

However, the Dapu MD250 mid-drive motor also has some drawbacks you should know before buying it. Some of the cons are:

  • Expensive compared to other motors
  • It may require some modifications to your bike frame
  • It may cause more wear and tear on your drivetrain
  • May void your bike warranty
  • It may not be legal in some countries or regions

 

Conclusion

The Dapu MD250 mid-drive motor is an excellent choice for anyone who wants a robust and reliable mid-drive engine for their electric bike. It offers many features and benefits that make riding an e-bike enjoyable. However, it has some drawbacks you should consider before buying it. You should also check the local laws and regulations regarding e-bikes in your area before using them.

 

shengyi cmt03 motor

 

Review of SYI CMT03 Ebike Mid Motor


If you are looking for a powerful, efficient, and lightweight mid-drive motor for your electric bike, consider the SYI CMT03 Ebike Mid Motor. This motor is designed by Shengyi, a leading manufacturer of e-bike motors in China, and offers some impressive features and performance.

 

Features of SYI CMT03

The SYI CMT03 Ebike Mid Motor is a two-stage gearing motor with a rated power of 250 watts and a maximum torque of 105 or 110 Nm, depending on the voltage. The motor has an integrated controller and a high-precision torque sensor that delivers smooth and responsive pedal assistance. The motor also has a walk assistance function and an e-brake function to activate the rear light.

 

The SYI CMT03 Ebike Mid Motor is compatible with 20 to 29-inch wheels and has a modular installation that makes it easy to fit on most frames. The motor weighs only 3.5 kg and has a low noise level of less than 55 dB. The motor also has an IP65 rating, which means it is dustproof and water-resistant.

 

Pros and Cons of SYI CMT03

One of the advantages of the SYI CMT03 Ebike Mid Motor is that it can work well with different types of bikes, especially mountain bikes. The motor can provide strong climbing capability and stable power output on various terrains. The motor also has many gearing options, thanks to its direct connection to the cranks and gears.

 

The SYI CMT03 Ebike Mid Motor has been used by some reputable e-bike brands, such as Specialized, who have praised its performance and quality. The motor has also passed the EN15194 certification, which means it meets the European standards for safety and reliability.

 

The SYI CMT03 Ebike Mid Motor has its drawbacks, however. One of the main disadvantages of this motor is that it has a relatively low battery range compared to other mid-drive motors. The motor has a 418 Wh battery that can provide up to 70 miles of range, but this may vary depending on the riding conditions and the level of assistance. Another drawback of this motor is that it may require more maintenance than hub motors due to its complex structure and components.

 

Conclusion

Overall, the SYI CMT03 Ebike Mid Motor is an excellent option for riders who want a powerful, efficient, and lightweight mid-drive motor for their electric bikes. The motor can offer smooth and natural ride quality, strong climbing capability, low noise level, and modular installation. However, riders should also be aware of this motor’s low battery range and potential maintenance issues.

 

shengyi cmt01n motor

 

Review of the Shengyi CMT01N Ebike Mid Motor


If you are looking for a robust and reliable mid-drive motor for your electric bike, consider the Shengyi CMT01N Ebike Mid Motor. This motor is designed to provide a strong climbing capability, high efficiency, and low consumption for a comfortable and enjoyable ride.

 

In this section, I will review the features, advantages, and disadvantages of the Shengyi CMT01N Ebike Mid Motor based on my experience and online research. I will also compare it with other popular mid-drive motors in the market and give you my final verdict.

 

Features of the Shengyi CMT01N Ebike Mid Motor

The Shengyi CMT01N Ebike Mid Motor is a 500W motor that can run on 36V or 48V batteries. It has a maximum torque of 90 N.m and a speed limit of 25 km/h. It has an internal controller and a high-precision torque sensor that can adjust the power output according to the pedal force and speed.

 

The motor is compact and lightweight, weighing only 4.6 kg. It has a unique installation bracket that connects with the bike’s frame and does not interfere with the chain or derailleur. The motor is compatible with most standard bikes with a 68-73 mm bottom bracket width.

 

The motor has a power assistance ratio of 1:3 to 3:1, which means that for every watt of power, you input through pedaling, the motor will output between 3 to 9 watts of power. This gives you a smooth and natural riding feeling without too much strain on your legs.

 

The motor also has some safety features, such as over-current protection, over-voltage protection, over-temperature protection, and speed limit protection. The motor has an LCD display showing the battery level, speed, distance, time, and mode.

 

Advantages of the Shengyi CMT01N Ebike Mid Motor

One of the main advantages of the Shengyi CMT01N Ebike Mid Motor is its power and performance. The motor can easily handle steep hills and rough terrain, thanks to its high torque and power assistance ratio. The motor also has a good range and efficiency; it consumes less energy than other motors with similar power output.

 

Another advantage of the Shengyi CMT01N Ebike Mid Motor is its compatibility and ease of installation. The motor can fit most standard bikes with minimal modifications and does not require any external wiring or components. The installation process is straightforward, as you only need to replace your existing bottom bracket with the motor bracket and connect the display and battery.

 

A third advantage of the Shengyi CMT01N Ebike Mid Motor is its quality and durability. The motor is made of high-quality materials and components that withstand wear and tear. The motor also has a good water resistance rating of IP65, which means it can resist dust and water jets from any direction.

 

Disadvantages of the Shengyi CMT01N Ebike Mid Motor

One of the main disadvantages of the Shengyi CMT01N Ebike Mid Motor is its noise level. The motor produces a noticeable whirring sound when running, especially at high speeds or under heavy load. This can be annoying for some riders and bystanders and attract unwanted attention from authorities or thieves.

 

Another disadvantage of the Shengyi CMT01N Ebike Mid Motor is its limited customization options. The motor only has three modes: eco, normal, and sport. You cannot adjust each mode’s power level or speed limit, nor can you switch off the pedal assist function completely. This can be frustrating for some riders who want more control over their riding experience.

 

A third disadvantage of the Shengyi CMT01N Ebike Mid Motor is its availability and warranty. The motor is only widely available in some countries or online platforms, and it can be hard to find spare parts or accessories. The motor also has a limited warranty period of one year, which may not cover all defects or damages.

 

Review of the CMT07 Ebike Mid Motor by Shengyi


If you are looking for a robust and reliable mid-drive motor for your electric bike, consider the CMT07 Ebike Mid Motor by Shengyi. This motor is designed to provide smooth and efficient pedaling assistance, with a maximum torque of 80 Nm and a peak power of 500 W. The motor is compatible with various types of bikes, including mountain bikes, city bikes, and trekking bikes. It also supports different battery voltages, ranging from 36 V to 48 V.

 

One of the advantages of the CMT07 Ebike Mid Motor is that it has a compact and lightweight design, weighing only 3.8 kg. The motor is integrated into the bike’s bottom bracket, which helps improve the ride’s balance and stability. The motor also has a low noise level, making it suitable for quiet environments. The motor has an LCD display showing the speed, battery level, assist mode, and other helpful information.

 

The CMT07 Ebike Mid Motor has four levels of pedaling assistance, from eco to turbo. The eco mode provides minimal assistance and maximizes the battery range, while the turbo mode provides maximum assistance and speed. The motor also has a walk assist function, which helps to push the bike forward when walking uphill or on rough terrain. The motor has a speed sensor that detects the rotation of the pedals and adjusts the power output accordingly.

 

The CMT07 Ebike Mid Motor is compatible with various types of sensors, such as torque, cadence, and brake sensors. These sensors help to improve the performance and safety of the motor. For example, the torque sensor measures the force applied to the pedals and provides proportional assistance, while the brake sensor cuts off the power when braking. The motor also has a built-in controller that protects the motor from overcurrent, overvoltage, overheating, and short circuits.

 

The CMT07 Ebike Mid Motor is a great choice for anyone who wants to upgrade their bike with a mid-drive motor. The motor offers high power and torque, smooth and responsive pedaling assistance, and a user-friendly LCD display. The motor is also easy to install and maintain, as it does not require any external wiring or components. The motor has a warranty of two years from the date of purchase.

 

Review of the Shengyi CMT03P Ebike Mid Motor


The Shengyi CMT03P is an upgraded version of the CMT03, which was launched a couple of years ago and has been widely used in city e-bikes. The CMT03P offers 120 Nm of torque, which is 15 Nm more than the CMT03 and one of the highest among mid-drive motors on the market. This means that the CMT03P can easily handle steep hills and heavy loads. The motor also has a two-stage gearing system that reduces the noise and increases efficiency.

 

The Shengyi CMT03P has an integrated controller and a high-precision torque sensor that detects the pedaling force and adjusts the power output accordingly. This gives a natural, responsive riding experience matching your pedaling style and speed. The motor also has a walk assistance function that helps you push the bike when you are not riding. The motor supports e-brake and rear light functions as well.

 

The Shengyi CMT03P has a sleek, compact design that fits best with most bike frames. The motor weighs only 3.5 kg, which is relatively light for a mid-drive motor. The motor has a black color and a square shape that makes it stand out from other motors. The motor is compatible with 20″ to 29″ wheel sizes and can be installed with standard square or pyramid shafts.

 

The Shengyi CMT03P is certified by EN15194 and IP65 standards, which means it meets the safety and quality requirements for electric bikes in Europe. The motor can operate from -20°C to 45°C and withstand dust and water splashes. The motor has a rated voltage of 36V or 48V and a rated power of 250W or 350W, depending on your preference.

 

The Shengyi CMT03P e-bike mid-motor is a great choice for anyone who wants a robust, smooth, and reliable mid-drive motor for their electric bike. The motor can easily handle any terrain and load and provide a natural and comfortable riding experience. The motor has a unique design and a lightweight, which makes it easy to install and use. The motor is also certified by international standards and has a long lifespan.

 

tongsheng tsdz2 mid drive motor

 

Review: Tongsheng TSDZ2 Mid-Drive Motor Kit


If you want to convert your existing bike into an electric bike, you might be interested in the Tongsheng TSDZ2 mid-drive motor kit. This kit is designed to replace your bike’s bottom bracket and crankset with a powerful 250W or 350W motor that can assist you with up to 25 km/h or 32 km/h, respectively. The kit also comes with a battery, a display, a speed sensor, a thumb throttle, and all the necessary wiring and hardware.

 

Features of TSDZ2

The Tongsheng TSDZ2 motor kit installation is relatively straightforward as long as you have some basic tools and mechanical skills. You will need to remove your bike’s bottom bracket and crankset and install the motor in its place using the supplied bolts and washers. You must also mount the battery on your bike’s frame or rack, connect the display and the speed sensor to the motor, and attach the thumb throttle to your handlebar. The whole process should take about an hour or less.

 

The performance of the Tongsheng TSDZ2 motor kit is impressive and satisfying. The quiet and smooth motor provides enough power and torque to tackle any hill or headwind. The torque sensor makes the motor feel like an extension of your legs, rather than a separate entity. The battery has a large capacity of 10.4Ah or 14Ah, depending on your chosen model, and can last for up to 80 km or 100 km on a single charge. The display shows you all the essential information such as speed, distance, battery level, assistance level, and error codes.

 

Pros and Cons of TSDZ2

The main advantage of the Tongsheng TSDZ2 motor is that it uses a torque sensor instead of a cadence sensor to determine how much assistance to provide. This means that the motor responds more smoothly and naturally to your pedaling effort, giving you a more comfortable and realistic riding experience. The motor also has four levels of assistance that you can adjust from the display and an eco mode that reduces power consumption and extends the battery life.

 

The drawbacks of the Tongsheng TSDZ2 motor kit are minor and manageable. The motor is slightly heavier than other mid-drive motors on the market, adding about 3.6 kg to your bike’s weight. The display could be more brightly and colorful and can be hard to read in direct sunlight. The thumb throttle is not ergonomic or responsive and can be accidentally activated by bumping into it. The wiring can be messy and exposed, especially if you have a full-suspension bike.

 

Conclusion

Overall, the Tongsheng TSDZ2 mid-drive motor kit is an excellent option for anyone who wants to convert their bike into an electric bike without spending too much money or compromising quality.

 

Final Thoughts


Those mid-drive motors in my reviews have their advantages and features. Just because they are not as famous as tier 1 brands like Bafang, Shimano, or Bosch does not mean they are worthless. They are still worth trying out.

 

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