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Works for front and rear mounted motors, both on left and right side as needed.
Splined inserts made from hardened 17-4 for up to double the spinout strength compared to most regular stainless steels.
Splined-inserts are included for 12, 14 and 16mm axles.
Made from 3mm stainless steel, the arm strong and is firmly held in place by our equally flexible and strong Frame Clamp.
Arm held in place using open-ended slotted hole for easy wheel removal.
Flexible splined insert concept that allows 50 angles of orientation so you can easily position the arm parallel to a frame/fork component.
Frame Clamp is held onto the frame component (fork/frame) by strong hose clamps - 2 sizes are provided to cover all fork/frame sizes.
Use this Torque Arm when threaded eyelets are not available on the frame to anchor the arm on. If eyelets are available, we recommend our TorqArm V5.
All torque arm parts proudly made in Canada.

Product description

Grin makes Torque Arms you can rely on

Since the early 2000's cheap imported hub motors have been a popular option for converting acoustic bikes to electric. We set out to solve the issue of Axle Spin Out, and can say that our V5, V6, and V7 Arms are the best torque arms ever designed for hub motors with axle flats.

V5 Torque Arm - Eyelets

Our V5 installs front or rear on any frame with fender eyelets. The versatile press-fit insert is made of specially hardened 17-4 steel.

Need to fix a flat? All of our torque arms simply detach by loosening one bolt.

The V6 installs front or rear adapting to frames that lack fender eyelets.The Arm is fastened to your frame via the Frame Clamp and two hose clamps.

Just like the V5, the V6 uses press-fit Axle Insert made of specially hardened 17-4 steel.

The V7 installs front or rear and exerts up to 2000lbs of clamping force to secure the axle in place. The Arm is fastened to your frame via the Frame Clamp and two hose clamps.

The V7 uses two grade 12.9 bolts and specially hardened 17-4 steel for the clamp making it the ultimate Torque Arm for regen capable motors.