We've begun a series of experiments to help us fully understand the nature of bicycle fork failures where the hub motor axle spins out inside the dropouts. This can be a disconcerting failure mode with conversion ebikes that is all the more relevant with the rise of both aluminum forks and more powerful hub motors in recent years. Those interested in following these tests have a look at this thread on the endless-sphere forum, where we will be posting the methods and results.

We'll be learning the bounds of what regular bicycle forks with and without torque arms can handle, and hopefully from these tests we'll be able to engineer even better torque arm designs.