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Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit 72V 7200rpm Electric MotorcycleBike Conversion with 1:2.35 Gear Box
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Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit 72V 7200rpm Electric MotorcycleBike Conversion with 1:2.35 Gear Box
Experience powerful performance and easy installation with our 4000W Mid Drive Motor Kit, perfect for transforming your ride into a high-speed electric vehicle.
Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit 72V 7200rpm Electric MotorcycleBike Conversion with 1:2.35 Gear Box
Item #: 166234575

Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit 72V 7200rpm Electric MotorcycleBike Conversion with 1:2.35 Gear Box

Item #: 166234575
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Experience powerful performance and easy installation with our 4000W Mid Drive Motor Kit, perfect for transforming your ride into a high-speed electric vehicle.
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What Stands Out

Powerful Performance
Equipped with a 4000W motor, this kit delivers exceptional speed and torque, enabling electric bike conversions that outperform traditional models, making it ideal for enthusiasts seeking power.
High Efficiency
The 1:2.35 gear ratio optimizes performance, providing faster acceleration and better hill-climbing capabilities while maximizing battery life, ensuring efficient rides for long-distance travel.
Easy Conversion
Designed for straightforward installation, this mid-drive motor kit allows users to effortlessly convert standard bikes into electric motorcycles, making it accessible for anyone looking for a DIY upgrade.

Product Details

Shop Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit 72V 7200rpm Electric MotorcycleBike Conversion with 1:2.35 Gear Box online at a best price in Cook Islands. B0FKYRQX52

Who Should Buy?

Suitable For
  • High Performance Riders

    Ideal for riders seeking high speeds and robust performance for electric motorcycles or bicycles.

  • DIY Enthusiasts

    Perfect for individuals interested in converting traditional bikes into high-performance electric models.

  • Off-Road Adventurers

    Suitable for off-road biking due to the powerful motor and enhanced torque provided by the gear box.

Not Suitable For
  • Casual Riders

    Not suitable for those looking for a simple and less demanding electric bike solution.

Product Description

Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit 72V 7200rpm Electric MotorcycleBike Conversion with 1:2.35 Gear Box

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Customer Questions & Answers

  • Question: What is the maximum speed of the Hub Motor 4000W QS138 90H V3?

    Answer: The Hub Motor 4000W QS138 90H V3 can reach an impressive speed of up to 7200 RPM. This high-speed capability makes it suitable for converting regular bicycles into powerful electric motorcycles, enabling users to travel swiftly on various terrains. The motor's efficiency allows for fast acceleration, making it ideal for commuting or recreational riding. Riders can enjoy the thrill of high-speed travel while maintaining control and stability.
  • Question: What type of bike is compatible with the Hub Motor 4000W QS138?

    Answer: The Hub Motor 4000W QS138 is designed for a variety of bicycles, particularly those with strong frames suited for mid-drive motors. Ideal candidates include mountain bikes, fat bikes, and touring bikes. These types of bicycles provide the durability needed to handle the motor's power and torque. Ensure the bike's frame and components like the crankset and gear ratios are compatible for a successful conversion.
  • Question: How does the 1:2.35 gear ratio affect performance?

    Answer: The 1:2.35 gear ratio significantly enhances the motor's performance by increasing torque output and optimizing power delivery. This allows for better acceleration and improved hill-climbing capabilities, enabling riders to tackle steeper inclines with ease. Additionally, this gearing helps maintain a balance between speed and battery efficiency, making it suitable for various riding conditions, from urban commuting to off-road adventures.
  • Question: What are the advantages of using a mid-drive motor like the QS138 90H V3?

    Answer: Mid-drive motors like the QS138 90H V3 offer several advantages, including superior weight distribution and better handling compared to hub motors. They provide direct power to the bike's chain, allowing for efficient use of the existing gearing system, which results in enhanced hill-climbing capabilities and improved torque. This motor setup is particularly beneficial for cyclists looking to maintain a natural riding experience while gaining extra power.
  • Question: What battery specifications are recommended for the Hub Motor 4000W?

    Answer: For optimal performance, using a 72V lithium battery pack is recommended for the Hub Motor 4000W QS138 90H V3. This voltage ensures that the motor operates at its full potential, providing enough power for peak performance. A reliable battery will not only enhance speed and acceleration but also extend the overall range of your electric bike, allowing riders to travel longer distances without frequent recharges.
  • Question: Is installation complicated for the Hub Motor 4000W kit?

    Answer: Installation of the Hub Motor 4000W QS138 kit can be complex and may require some technical knowledge or mechanical skills. Although detailed instructions are typically included, users may need specialized tools and equipment to fit the motor and associated components properly. For those less experienced, seeking assistance from a professional bike mechanic or a knowledgeable friend can ensure a smooth and efficient conversion process.
  • Question: What kind of performance can I expect from the QS138 motor in terms of hill climbing?

    Answer: The QS138 mid-drive motor is engineered for impressive hill-climbing performance due to its powerful torque output. With a torque rating that enables it to push through challenging inclines effectively, riders can expect a significantly enhanced ability to tackle steep hills without sacrificing speed. This makes it an excellent choice for those who live in hilly areas or enjoy mountain biking.
  • Question: Can I use regenerative braking with the Hub Motor 4000W?

    Answer: The Hub Motor 4000W QS138 does not typically support regenerative braking as mid-drive motors rely heavily on traditional braking systems. However, upgrading to compatible brakes or components can enhance the overall efficiency of your electric bike. Focusing on effective braking solutions ensures safety during descents and improves your ability to manage energy consumption effectively while riding.
  • Question: What maintenance is required for the Hub Motor 4000W system?

    Answer: Maintaining the Hub Motor 4000W QS138 system involves regular checks on the motor, battery, and electrical connections. Keeping the motor clean from dirt and debris will ensure it functions optimally. It's also important to inspect the battery for any signs of wear and to secure all wiring to prevent damage. Regular maintenance enhances not just the longevity but also the overall performance of your electric bike, ensuring you enjoy reliable rides.
  • Question: Where can I buy the Hub Motor 4000W QS138 90H V3 in Cook Islands?

    Answer: You can purchase the Hub Motor 4000W QS138 90H V3 Mid Drive Motor Kit from Ubuy. They offer a variety of electric conversion kits, ensuring you receive a quality product that meets your needs. Ubuy is known for its extensive selection and reliability, making it a great choice for your electric motorcycle or bike conversion requirements in Cook Islands.

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Features & Benefits

  • Powerful 4000W QS138 mid drive motor for high-speed performance.
  • Compatible with 48V/60V/72V battery systems for versatile use.
  • Easy installation with pre-installed wheel hub design, no chain required.
  • Durable and waterproof construction for long-term reliability.
  • Ideal for e-bikes, scooters, trikes, and DIY electric vehicle projects.
  • Includes everything you need: motor, controller, speedometer, and throttle.

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