The Kink Senec pedals have no bearings which means simplicity and durability. Using a propriety pedal body material and grease the pedal bodies spin directly on the spindle acting as a bushing itself and leaves no small parts left to come loose or break. In addition to this new bearing-less system the Senec pedals use a massive 17mm forged hollow spindle. This creates a huge increase in strength over traditional pedal spindles while keeping about the same weight. The pedal bodies are also universal which means if you need to buy a replacement body it can be used on either the left or right side and are very affordable.