Model FR3922A1Chainring 46T 34T (910's)Outer ring Alloy SB BK anodized CNCCenter ring NAInner ring Steel ED, or PaintedRing Fixation InterchangeableArm Finish Polish Silver or BK anodizedCrank Material 6061 alloy forgedLength 170, 165, 155, 140, 135mmBCD 110mmChainguard OptionalAxle fixing bolt Cro-mo (M8)Chainline 43.5mmSQUARE Taiwan ChinaISIS Taiwan China