This will allow the axle to slot into your dropouts. Once you have installed the disk brake, loosen the axle nuts on the electric wheel. For added safety, install a second torque arm on the opposite side (purcahsed separately and available online). The hoseclamp supplied then anchors the arm to the fork which is the final step. This will efficiently transmit the torque away from your dropouts. To get the most out of the torque arm, the lever needs to be at max distance, which is when both arms are at an approximate right angle (90 degrees). Torque is force multiplied by perpendicular distance. The next step is to position the torque levers and the splinned parts so that the two main levers are perpendicular to each other (at a right angle, 90 degrees) just like on the previous page. This will usually be installed similar to the 3rd photos on this page, with the long piece on the outside of the splinned parts, to leave enough clearance between the motor hub and the torque arm components. The next step is to bolt on the longest part of the torque arm to the outside splinned part with the bolt and nut supplied. If you install the torque arm on the motor cable side, you can slide the components over the motor plug easily. We chose to install on the motor cable side. If you’ve already tightened the wheel nuts it’s just a simple case of loosening off one of these and assembing as shown. 30-40Nm (250 - 350 in lbs).ĪRC Universal Torque arm The first step in installing the torque arm is to assemble the splinned pieces over the motor axle. Make sure you have the right size as to protect the nuts from being stripped.

With these in place you can then tighten the axle nuts using a spanner or adjustable wrench. One torque washer should be fitted against the hub, on the inside of the forks (on each side) and then one flat washer on the outside. If the dropouts are not embeded firmly in the bottom of the drop out slots this could cause failure of the forks or cause the electric hub axle to become unsecure. Front Wheel Install With your bike upside down, your wheel should be pushed all the way down into the dropouts to make sure it’s a nice and tight fit.

E bike torque arm installation