O.Symetric Chainring kit 110mm Dura Ace FC 9000Ultegra FC6800 52/42 teeth

O.SYMETRIC chainring kit oval shape for optimised movement Material: aluminium Parts the point of death is overcome more easily a higher gear ratio is easier to ride higher efficiency, i.e. reduced heart rate with the same effort chronic knee pressure is reduced the muscles work more easily, as does the cardiovascular system higher speed uphill (approx. 5 seconds time gain per kilometre) higher speed on level ground (approx. 3 seconds time gain per kilometre)