Product Description The X145 by TA is a chainring for Campagnolo 4-arm cranks. Specifications:Application:RoadAttachment:145 mm bolt circle diameter, 4-armTeeth:46 T, 48 T, 49 T, 50 T, 51 T, 52 TGearing:2x11-speedTechnical Information:Material:aluminium (7075-T6)Compatibility:Campagnolo Super Record 2015-2018Campagnolo Record 2015-2018Campagnolo Chorus 2015-2018Campagnolo Potenza 2015-2018Campagnolo Centaur as of 2018Position: externalFeatures:designed and produced in France Note:The manufacturer recommends a difference between 12 and 16 teeth between the chainrings.Manufacturer Numbers:46 tooth:PL-48145309-4648 tooth:PL-48145309-4849 tooth:PL-48145309-4950 tooth:PL-48145309-5051 tooth:PL-48145309-5152 tooth:PL-48145309-5253 tooth:PL-48145309-53 sold-outContents:1 x TA X145 chainring Manufacturer: Spécialités T.A. 41 bis rue de Laon 02150 Sissonne France france@specialites-ta.com