X.P.S.S. (eXtreme Performance Shifting System), the acronym that refers to the most efficient system ever, allows you to shift at high speed and with incredible precision.
At first glance, the Chorus crankset does not appear to have changed. There are, however, numerous improvements. The chainrings have been completely redesigned. The new teeth design with 8 ascending and 2 descending zones offer top-class performance.
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Note: Requires ULTRA-TORQUE(TM) BB cups