The Torque Arm V6 is a universal design from Grin Technologies that secures both 12mm and 14mm ebike axles against spinout, using a hose clamp to secure the end of the arm. For bikes with fender eyelets you can also consider the V5 model (   • Grin Tech's Torque Arm V5  Installat...  )

This design evolution came about from extensive lab testing and is many times superior to our V3 (rront) and V4 (rear) arms. The one model works equally well on front forks as rear chainstays. The splined insert accommodates a range of dropout angles, and is made of a specially hardened 174 stainless steel alloy that provides over double the spinout strength of regular stainless. Where other torque arms smear apart, this V6 arm holds tight.

Here is Grin's general torque arm info page:
https://ebikes.ca/productinfo/grinp...

Here is the .pdf user manual:
https://ebikes.ca/amfile/file/downloa...

Here is where you can buy them from Grin directly:
https://ebikes.ca/shop/electricbicyc...

And we also have an amazon listing for those who like to deal with the devil:
https://www.amazon.com/GrinTechnolog...