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 TGearing:3x9-speed, 3x10-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:Campagnolo and Fulcrum cranks with 135 mm standard bolt circle diameterPosition: centreFeatures:hole spacing 80 mmblack or anodised silverdesigned and produced in France Note:The manufacturer recommends a difference of 12 to 16 teeth between the smallest and largest chainrings.Manufacturer Numbers:black 42 tooth:PL-50135209-42silver 39 tooth:PL-50135202-39silver 40 tooth:PL-50135202-40silver 42 tooth:PL-50135202-42Contents:1 x TA Vento chainring Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com