A simple way to add strength to your front fork. But totally optional. Electric bike motors add additional stress on front forks. That is why we recommend steel forks, or adding a torque arm if using an aluminum or carbon fiber fork, or if your bike’s fork is really, really old. Torque arms are not required, but can offer a sense of security by adding increased strength to your bike’s hold on the axle and transporting some of the strain away from the drop outs.