Product Description TA Zephyr is a chainring for road compact cranks. Specifications:Application:RoadAttachment:110 mm bolt circle diameter, 5-armTeeth:41 T, 42 T, 44 T, 46 T, 48 T, 50 T, 52 T, 53 T, 54 TGearing:3x9-speed, 3x10-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:for Road Compact cranks (110 mm bolt circle diameter)also for MTB cranks before 1993 with 110 mm bolt circle diameter and hole spacing 65 mm (old Shimano MTB standard)Position: externalFeatures:hole spacing 65 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 41 tooth:PL-50110309-41silver 41 tooth:PL-50110302-41black 42 tooth:PL-50110309-42silver 42 tooth:PL-50110302-42black 44 tooth:PL-50110309-44silver 44 tooth:PL-50110302-44black 46 tooth:PL-50110309-46silver 46 tooth:PL-50110302-46black 48 tooth:PL-50110309-48silver 48 tooth:PL-50110302-48black 50 tooth:PL-50110309-50silver 50 tooth:PL-50110302-50black 52 tooth:PL-50110309-52silver 52 tooth:PL-50110302-52black 54 tooth:PL-50110309-53black 53 tooth:PL-50110309-53silver 53 tooth:PL-50110302-53silver 54 tooth:PL-50110302-54Contents:1 x TA Zéphyr chainring Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com