ROTOR Q-Rings were designed to emulate the gear variations of Rotor cranks in the power stroke. They do not eliminate dead spots as do ROTOR Cranks, but reduce their negative effects by moving the legs through these zones faster, enabling the cyclist to generate more strength in the power stroke (where 90% + of all power is produced). Q-Rings vary the equivalent tooth size, increasing it when the rider is in the power zone. Gathering all experience built up with ROTOR Cranks, we then subtly and smoothly minimized the gear of Q-Rings around the dead spots. Q-rings are better for your knee than standard chainrings because the forces required to keep the bike moving when your pedals are around the upper dead spot are lowered, meaning that tendons and knee joint are not punished as hard. For example, a 53T Q-Ring is equivalent to a 51T near the upper dead spot. As the pedal descends and more strength can be applied, the equivalent chainring diameter gradually increases to 56T at the moment of maximum power. It then smoothly and gradually returns to a 51 tooth so that the pedals can pass through the next power stroke effortlessly. What really sets Q-Rings apart, is that they also take leg and bike inertia into account, visible in the orientation of the smallest and largest effective chainring diameters. Road Q-Rings are used by UCI World Road Champion 2006, Marianne Vos 2004 Ironman Brazil winner Olaf Sabatschus World Cyclocross Champion Marianne Vos, 2005 TDF competitor David Cañada Tyler Hamilton. XTerra World Champion Eneko Llanos Sean Yates, Discovery Pro Team
