Thank you for visiting our site. Number of Chainrings: Double. Compatible Speeds: 11 Speed. Crank Arm Material: Carbon. Axle Specification: Ultra-Torque Titanium. Extreme Performance Shifting System. The listing identifies this as a Campagnolo Super Record crankset with carbon crank arms and a titanium Ultra-Torque axle. It is configured with 52/36T chainrings and is listed as compatible with 11-speed drivetrains. We appreciate your understanding in this matter. International Buyers – Please Note. We are located in Chiba Japan. It’s our pleasure to make you happy by proposing our recommend item. If you have any questions or request about items, please feel free to ask us. We Do Not Mark Merchandise Values Below Value Or Mark Items As “Gifts” – US And International Government egulations prohibit such behavior.