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5mm Left Crank Arm
5 Color Black Weight 45
40mm Length
spindle steel size 9/16" color blue weight 294g
Shimano FC-09 50t 11-Speed Asymmetric 110BCD Black Chainring MPFN-M175-01-006-01 5mm Left Crank ArmSystem supremacy Shimanos Dura Ace 11 speed asymmetric chainrings provide clean chain engagement for reliable riding. The 110 BCD bolt pattern is compatible only with cranks with a matching 110 BCD. System engineering at its peak. Redesigned gear teeth profile to fit wider gear pitch Optimum power transfer Best balance for lighter weight and efficiency 4 arm construction Shorter length of rear center with O. L. D. 135mm Hollowtech II
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