Product Code: SM-CRM95 Series: XTR M9100 Color: Grey/Black Cassette Speeds: 12-Speed Gear Combinations: 30t, 32t, 34t, 36t, 38t Shimano's XTR SM-CRM95 chainrings ensure smooth, responsive pedaling even on rough trails. They incorporate Dynamic Chain Engagement+ tech, boasting unique gear teeth profiles for superior chain engagement and retention.