Description Campagnolo Athena Carbon 11 Speed Chainring – Options. About Product: Beautifully finished, ultra hard, Carbon Specification: Bolt Pattern: 5-Bolt Chain Compatibility: Athena Carbon CT 2013-2016,Athena Black CT 2013-2016,Athena Carbon CT 2011-2012,Athena Carbon CT 2009-2010, Chainring BCD: 110 Chainrings Material: Carbon All our products are professionally packed and shipped with tracking number and insurance. Lafo Bikes is offering you high end bikes, frames, parts & accessories that we love. We are selling only genuine products, no copy or replica. Our goal is to offer you the best price on amazing bikes.