Product Description TA Alize is a chainring for 9- and 10-speed Shimano Road cranks. Specifications:Application:RoadAttachment:130 mm bolt circle diameter, 5-armTeeth:46 T, 48 T, 49 T, 50 T, 51 T, 52 T, 53 T, 54 T, 55 T, 56 T, 58 T, 60 T, 61 TGearing:2x9-speed, 3x9-speed, 2x10-speed, 3x10-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:for Road cranks from Shimano and other manufacturers except Campagnolo and FulcrumPosition: externalCompatibility:76 mm hole spacingblack or anodised silverdesigned and produced in France Note:The manufacturer recommends a difference of 12 to 16 teeth between the largest and smallest chainrings.Manufacturer Numbers:silver 46 tooth:PL-50130302-46black 46 tooth:PL-50130309-46silver 48 tooth:PL-50130302-48black 48 tooth:PL-50130309-48silver 49 tooth:PL-50130302-49black 49 tooth:PL-50130309-49silver 50 tooth:PL-50130302-50black 50 tooth:PL-50130309-50silver 51 tooth:PL-50130302-51silver 52 tooth:PL-50130302-52black 52 tooth:PL-50130309-52silver 53 tooth:PL-50130302-53black 53 tooth:PL-50130309-53black 54 tooth:PL-50130309-54silver 54 tooth:PL-50130302-54silver 55 tooth:PL-50130302-55silver 56 tooth:PL-50130302-56silver 58 tooth:PL-50130302-58silver 60 tooth:PL-50130302-60silver 61 tooth:PL-50130302-61Contents:1 x TA Alizé chainring Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com