The e*thirteen Sidekick hub is designed to counteract what's known as pedal kickback. Altogether, we had the chance to ride with ten different testers. The tests took place under real-world conditions across various regions — including Freiburg, Heidelberg, the Palatinate, Saalbach, the Odenwald, and the Spessart. Rider weights ranged from 55 to 105 kg (120 to 230 lbs), and the bikes covered everything from trail and enduro to freeride and full-on DJI-powered e-MTBs. The testing also included blind tests.