Shimano FC-09 50t 11-Speed Asymmetric 110BCD Black Chainring MPFN-M175-01-006-01 Wolf Tooth Headset Spacers for

Wolf Tooth Headset Spacers for Trek Knock Block are machined in the USA out of aircraft grade aluminum

Color Silver Defined Color Silver Drivetrain Speeds 12 Half Link Chain No Links (links) 116 Weight 250 Width 5

5 Color Black Weight 45

2 Clincher Folding Black/Coffee/Graphite Reflex Vectran / PolyX Breaker E50

5mm Left Crank Arm

Shimano FC-09 50t 11-Speed Asymmetric 110BCD Black Chainring MPFN-M175-01-006-01 Wolf Tooth Headset Spacers forSystem 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