Grin Technologies Universal Rear Torque Arm V4 for Electric Bikes/ ebikes

Forget all the other torque arms that are all copies of the same design that are all over amazon. This is the one. Smart engineering and very strong. My fork ended up breaking caused by weak fork design and the torque from my disc brake. I was able to ride the bike home on a broken fork, held together by this product. Though it couldn't prevent the fork from breaking, it is the fault of the fork, not this product. Without it, I am certain it would've happened much sooner. I will now proceed to aluminum-braze and arc-weld this back together, and will add steel reinforcement. Very happy with this product. It may have even saved my life

Not much to say it's a torque Arm and does it's job very well.The material and laser cut machining quality is top notch.The design is such it could be made to work on any bike.I have had one on a bike for years and not a spec of rust.Yes quite expensive but in the long run totally worth it.The generic universal CN ones fooding AMZ right now are junk compared to Grins product, I would never trust my expensive motor with thin soft stamped metal and a single hose clamp.

I added the wheel and stupid me did not put washers in between the motor and frame causing the wheel to spin out from dropouts. Fortunately, there were signs that something was wrong and I was not going fast (it was the first test ride) and when I tried throttle the wheel just ripped out- guess what prevented it from going full berserk? Yep, it was hanging on the torque arm.When I disassembled it to add the washers and build it together again, I saw how much force must have been put through the arm, as it was bent quite a lot (see images), considering how thick that steel is. If I would use the cheaper arm that is barely half of the thickness and who knows what metal, It would rip the wheel completely, destroying the wiring, frame and who knows what else.I just gave it some good ole hammer love (needed to hit it quite a bit- it really is a stubborn piece of metal) and it is as good as ever. Just using the remaining two slots for the metal fasteners.I absolutely recommend using this giga chad torque arm and not some "can metal" limpy wimpy joke arm.Take care and be careful with your creations!

High quality construction. Recommended.

This set is made of very sturdy parts, but I could not find a suitable configuration to fit my ebike’s frame.Sadly, this kit isn’t returnable, so I’m holding onto it.I ended up getting a pair of single-piece torque arms from the manufacturer of my ebike after they upgraded to those from chintzy tabbed washers on a minor refresh of the model. Fortunately for me, they used the same dropout design so I could use the! And they were nice enough to give me a complimentary set! Kudos to Ride1Up for their excellent customer service!