Product Description The Vento chainring from TA is compatible with standard Campagnolo 9- and 10-speed cranks. Specifications:Application:RoadAttachment:135 mm bolt circle diameter, 5-armTeeth:39 T, 40 T, 42 T, 44 TGearing:2x9-speed, 2x10-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:Campagnolo and Fulcrum cranks with 135 mm standard bolt circle diameterPosition: innerFeatures:hole spacing 80 mmblack or anodised silverdesigned and produced in France Note:The manufacturer recommends a difference between 12 and 16 teeth between the chainrings.Manufacturer Numbers:silver 39 tooth:PL-50135102-39black 39 tooth:PL-50135109-39silver 40 tooth:PL-50135102-40silver 42 tooth:PL-50135102-42black 42 tooth:PL-50135109-42silver 44 tooth:PL-50135102-44black 44 tooth:PL-50135109-44Contents:1 x TA Vento chainring Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com