Description Campagnolo Athena 11 Speed Chainring – Options. About Product: Beautifully finished, ultra hard, CNC Machined Specification: Bolt Pattern: 5-Bolt Chain Compatibility:Athena Carbon 2011-16, Athena Black 2011-16, Athena Carbon 2010,Athena Silver 2011-2016,Athena 2010 Chainring BCD: 135 Chainrings Material: Alloy 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.