Special PVD Rainbow Titanium coating process makes chainrings very durable and incredibly beautiful- NOTE: Due to the nature of the PVD process, every chainring is unique and color may vary. Not a single chainring is the same which makes your new ring completely individual- Designed to fit Shimano XTR M9100 , M9120, XT M8100, M8120, M8130, SLX M7100, M7120, M7130 and FC-MT900 cranksets- Works ONLY with CN-M9100, 8100 & 7100 chain- Oval rings help the rider to spin smoother and more efficiently- 32t is equivalent to 30t at dead spot and 34t at the power zone- Narrow-wide tooth profile keeps the chain snug, allowing you to leave the chain guide behind- Designed in UK, manufactured in Poland