Blackspire superpro chainring shimano xtr fc m980cncd 7075 t 6 for use with shimano xtr fc m980 crankset the engineered ringmodified shift gates and special profiles to allow flawless shifting middle and outer chainrings have strategically placed stainless steel pins to further enhance shifting middle chainrings are cut from thick 190 material outer chainrings are cut from 160 material for use with 9 or 10 speed drivetrains 10438t and 10440t chainrings for 2x drivetrainsanodized wla