Product Description The TA Chinook11 is a 10-/11-speed chainring for MTB. Specifications:Application:All Mountain, Cross CountryAttachment:64 mm bolt circle diameter, 4-armTeeth:22 T, 24 T, 26 T, 28 TGearing:2x10-speed, 3x10-speed, 2x11-speed, 3x11-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:for MTB cranks with 104/64 mm bolt circle diameterPosition: innerFeatures:CNC manufactureddesigned and produced in France Note:Chainrings with an older production date have an " 10" printed on them, while chainrings with a more recent production date have " 11" printed on them. However, there is no difference in compatibility (10- to 11-speed). The manufacturer recommends a difference of 10 to 14 teeth between the smallest and largest chainrings.Manufacturer Numbers:22 tooth:PL-41064159-2224 tooth:PL-41064159-2426 tooth:PL-41064159-2628 tooth:PL-41064159-28Contents:1 x TA Chinook11 chainring4 x spacers, 8.5 x 12 x 0.5 mm Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com