fits Shimano Dura Ace FC-R9100 54-42T crank and 55-42T crank 54T and 55T Chainrings are excluded Brand Shimano MPN Y1VP42000 Bolt Center Diameter 110 mm Teeth 42t For Bike Type Time Trial/Triathlon Color Black Type Chain Ring Model Dura Ace 9000 UPC 689228935884 Part Type Bicycle part ColorBlack MaterialAluminum Chain CompatibilityShimano 11 BCD110mm Teeth42t .
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