Torque Arm for E-Bike Conversion – Front & Rear Wheel Support for High-Powered Hub Motors. A torque arm is an essential safety component for electric bike conversions that use powerful hub motors. It is a robust metal bracket designed to connect securely from your motor’s axle to your bike frame, effectively preventing the axle from spinning out of the dropout under high torque loads.
Why You Need a Torque Arm:
High-powered motors, such as the Bafang H405 500W and especially the G0900 750W “beast”, generate significant torque at the motor axle when the throttle is engaged. This force can cause the motor axle to twist inside the bike’s dropouts, potentially widening the dropout slot. If left unsupported, the axle can spin itself out of the dropout entirely, leading to:
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Damage to the motor cable (which can be ripped out)
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Loss of motor function
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Potential safety hazards, including sudden loss of power or control,l that might throw you off the bike
For this reason, a torque arm is a critical upgrade for any conversion kit using mid- to high-powered hub motors. While 250W motors usually don’t require a torque arm due to their lower torque output, we strongly recommend torque arms for all motors above 500W for your safety and motor longevity.
Features:
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Compatibility: Designed to fit most common electric bike hub motors and frames, suitable for both front and rear wheel installations
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Durable Construction: Made from strong, corrosion-resistant metal to withstand the intense forces and vibrations of e-bike use
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Easy Installation: Simple bolt-on design allows quick mounting without specialized tools or frame modification
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Recommended Models: This torque arm is ideal for use with the 500W Bafang H405 motor. For the more powerful 750W G0900 motor, we recommend the Grin Technologies V6 Torque Arm, which offers enhanced strength and reliability.
Ensure Safe & Reliable Rides
Don’t compromise your safety or your motor’s durability. Add this torque arm to your conversion kit and ride with confidence, knowing your motor axle is firmly secured against extreme torque forces.
If you need help choosing the right torque arm or additional installation advice, feel free to contact us at Rebellion Bike.