Product Description The Shimano 11-speed Chainring for FC-RS510 Cranks The has a bolt circle diameter of 110 mm with asymmetric holes. The 34-tooth version is made of aluminium, the 50-tooth chainring of an aluminium-resin composite. As usual with Shimano, these chainrings have been designed to work smoothly with the other drivetrain components. Specifications:Application:RoadAttachment:110 mm pitch circle, 4-arm asymmetricalTeeth:34 T, 50 TGearing:2x11-speedTechnical Information:Combinations:34-50 TMaterial:aluminium (34 T), aluminium/resin (50 T)Compatibility:FC-RS510Features:anodisedModels:34 tooth: Type:MSManufacturer Number:Y-1WF34000 50 tooth: Type:MSManufacturer Number:Y-1WF98010Note to Type Designation:The type designation (one or two characters) helps identify the compatibility of various chainrings with other chainrings. Because the larger chainrings have specially-formed teeth and upward shifting assistance, only particular smaller chainrings will match to ensure proper shifting performance. An XY chainring should only be combined with another XY chainring. This applies to all other types as well. Contents:1 x Shimano FC-RS510 chainring Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com