Rotor qx1 narrow wide oval chainring for ultimate in single ring performance throw the new rotor qx1 oval mountain ring on your rex 1 cranks youll be using the same chainring set up that led christoph sauser to victory at the cross country marathon world championships read the interview with cedric gracia on oval chainrings here ovalized chainrings for maximum performance introducing the new qx1 chainring already xcm world champion under christoph sauser the qx1 has an alternating widenarr