Oneup components narrow wide xtr m9000 single chainringnarrow wide chainrings for xtr m9000m9020 11 speed cranks with perfect chainline of 49mm you will benefit from a quieter drivetrain and improved chain wear reinforced wide tooth design provides maximum ring durability when run without a bash guard and aggressive crud chamfers give excellent mud shedding performance and extended ring life oneup components is a small team of passionate mountain bikers dedicated to bringing genuine value