Top-Normal return for Precision up shifting and emergency downshifting. Preferred by traditional and gravity riders: Best matched with RAPIDFIRE Plus.Features Top-Normal return spring Super Wide Link for high rigidity Capacity: 43T Specifications Series XTRModel No. RD-M971Pulley Cage GS/SGSSpeeds 9Spring Type Top-NormalMax Front Difference 22TTotal Capacity 33T/43TMax Rear Sprocket 34TMin. Rear Sprocket 11TDirect Attachment YesFluoric Coated Link Bushings 4Sealed Bearing Guide Pulley YesSealed Bearing Tension Pulley YesSpring Type Yes11T pulley YesPulley Bolt Retainer Yes
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