For front forks with fender eyelets. Thick 1/4" stainless steel plate. Prevents axle spinout and resulting motor cable damage. For M12 or M14 hub motor axles. FAQ: Q: Is one torque arm enough, or should I use two? A: For the torque arms we make with the thick ¼" axle plate, one is almost always more sufficient. Installing a 2nd torque arm will be tricky if you have a hub where the cable exits the end of the axle, as you'll need to cut the connectors off the wire and then reattach them. If you are using a 3rd party torque arm that is made from thinner 1/8" (3mm) metal plate, then we'd recommend doubling up and installing 2 arms. Q: Does it matter if I have 12mm or 14mm axles? A: No it does not matter, the torque arm plates are sized to accommodate a 14mm axle, but will fit a 12mm fine as well. With a 12mm axle, there is a small gap at the top or bottom of the slotted hole, but it is of no consequence and does not affect the spinout retention strength.