Bras de couple V5
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Bras de couple V6
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Bras de couple V7 Regen 12mm
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V7 Regen Torque Arm 14mm
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Be Confident and Safe With Grin
Grin was the original inventor of the ebike torque arm almost 20 years ago and continues to engineer the most reliable torque arms on the planet.
Safely secure your non-Grin hub motor to your frame, eliminating mechanical risk failure. All Grin Kits include a torque arm, so if you're building with a Grin Kit, don't worry we have you covered.
Don't Risk Mechanical Failure
Torque arms are used to fully secure your hub motor to your bicycle. When a hub motor is powered up, all the torque that the motor generates to spin a wheel forwards causes an equal and opposite torque on the axle, causing it to rotate backwards.
High-powered systems generate a lot of torque, and these forces can damage or destroy a bicycle dropout, the motor cables, and more: in the worst case, it can cause the wheel to fall off of the bike.
A torque arm is a separate piece of metal attached to the axle which can transfer the axle torque further up the frame, thus relieving the dropout itself from taking all of the stresses.
Secure Your Motor
Knock-off torque arms use cheap materials and inadequate design. They fail unexpectedly, causing motor damage or detaching the front wheel from the bike while riding. Use a Grin tested and engineered Torque Arm.
Axle spin out
Spreads Steel
Breaks aluminum
Universal Torque Arms
V7 - Regen
Engineered for Regen Braking
Our V7 Torque Arm is designed for motors with regenerative braking, and has a unique and powerful clamping system that puts over 1500 pounds of compressive force on the axle flats to prevent any back and forth wiggle.
V6 - No Eyelets
Install front or rear
The V6 Torque Arm uses a separate hardened metal insert with a toothed interface allowing for flexible positioning in both front and rear motor installations.
V5 - For Eyelets
Install at any angle
The V5 Torque Arm has the same hardened metal insert feature as our V6 arm, but secures to the frame via existing fender eyelets rather than using external hose clamps.
Make Your Ebike Safer
Safely Secure Your Motor
Grin torque arms are engineered to withstand the power of modern ebike motors.
Compatible with regen-capable systems
Grin makes the only torque arm designed for regen-capable systems, engineered and tested to withstand repeated loading in opposite directions without failure.
Fits most bikes
Universal fit for almost any bike frame:
- Regen systems: V7
- Bikes with fender eyelets: V5
- Bikes without regen or fender eyelets: V6
