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StVZO Reverse Mount applications are limited to specifically designed models and they are marked as such
Material: Polyester
easy setup and reliability
PROFESSIONAL-GRADE DURABILITY
Hecto StVZO 40
Shimano Dura-Ace FC-R9100 170mm 52-36T 11 Speed Crankset 00.6118.659.009 StVZO Reverse Mount applications areThis Shimano Dura Ace FC R9100 HOLLOWTECH II Crankset (2x11 speed) is wider than its predecessor but is still very lightweight by utilising the Hollowtech II technology. The highly rigid hollow structure cuts down on weight but still maintains strength resulting in better power transfer and more precise front shifting.. Series: DURA ACE . Optimum power transfer . Best balance for lighter weight ( 7g) and efficiency . New 4 arm design for same