Description Chorus cassettes feature the Campagnolo Ultra-Drive system; the specially patterned sprockets are precisely machined so that they interface perfectly with every drive train component, flawlessly engaging the chain and raising the level of performance. Each cog is nickel chromed and made from a hardened alloy. Fits all Campy 9- and 9-/10-speed hubs from 1997 to present.
11-23 (11-12-13-14-15-16-17-19-21-23)
12-25 (12-13-14-15-16-17-19-21-23-25)
13-26 (13-14-15-16-17-18-19-21-23-26)
13-29 (13-14-15-16-17-19-21-23-26-29; medium cage rear derailleur required)
220g average weight
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