At first glance, the Chorus™ 2011 crankset does not show any changes. But actually there is plenty of news hidden behind the new look.

The chainrings have been completely redesigned. The new teeth design plus the new 8 ascending and 2 descending zones of the chainring enable top-class performance.

• X.P.S.S.™ (eXtreme Performance Shifting System), the acronym that refers to the most efficient system ever, lets you shift with extreme speed and incredible precision. full-carbon unidirectional-multidirectional cranks 
• Light alloy fixing bolts and nuts
• Light alloy chainrings with XPSS™ (eXtreme Performance Shifting System)
• Chainrings with hard anodization treatment 
• 8 pins on the large chainring 
• Integrated ULTRA-TORQUE™ semi-axles 
• Requires ULTRA-TORQUE™ BB cups