HOLLOWTECH II forging and a thicker steel spindle ensure this crank survives the burliest of impacts while optimizing rigidity and weight. Offered in lengths from 160-175mm and with all sizes of the reinforced SM-CR96 direct-mount chain ring, there is a specification of FC-M9220 for every enduro rider. Shimano XTR M9200 Groupset ReviewKey Features:Enduro Specific Spindle: A thicker enduro-specific spindle raises the mark for durability and big-hit survivability.HOLLOWTECH II: Shimanos forging provides optimal weight, stiffness and rigidity for Enduro riding and racing.Q Factor/Chain line: An enduro-optimized Q Factor brings race-feel familiarity, while a 55mm chain line offers maxed-out frame compatibility.Compatibility: M9220 cranks come standard with a 24mm spindle and are compatible with Shimanos threaded and Press Fit bottom brackets.