Product Description The Chinook from TA is a 4-arm chainring for MTB 9-speed cranks. Specifications:Application:All MountainAttachment:64 mm bolt circle diameter, 4-armTeeth:22 T, 24 T, 26 T, 28 T, 30 TGearing:2x9-speed, 3x9-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:for MTB cranks with 104/64 mm bolt circle diameterPosition: innerFeatures:black or anodised silverdesigned and produced in France Note:The manufacturer recommends a difference of 10 to 14 teeth between the smallest and largest chainrings.Manufacturer Numbers:black 22 tooth:PL-40064109-22black 24 tooth:PL-40064109-24black 26 tooth:PL-40064109-26black 28 tooth:PL-40064109-28black 30 tooth:PL-40064109-30silver 22 tooth:PL-40064102-22silver 24 tooth:PL-40064102-24Contents:1 x TA Chinook chainring Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com