August 20, 2005 We’ve written about ROTOR bicycle crank systems before – the ROTOR crank makes infinite sense in that it reduces the power "dead spot" at top-dead-centre (TDC), reduces stress on the knees and offers the ability to get more power to the rear wheel. (see simulation) ROTOR is now working on a new project … elliptical chainrings with variable regulations that can be customised for each rider's needs. The ROTOR Q-Ring is different from other ovalized chainrings; a new concept incorporating a patented variable regulation system (OCP) that applies some of the biomechanics of the Rotor Crank System to conventional cranks. Q-Rings give you more power during the pedal down stroke, just after the moment you develop maximum power, when you are generating 90% of your power output. Feedback from Q-Ring test pilots has been unanimous: easier and faster pedalling at high cadences, faster times in time trials (flat or rolling courses), much faster when climbing, a significant reduction in knee discomfort and a lower heart rate while achieving the same speed that they did with round chainrings on conventional cranks.