The Campagnolo Chorus 12-speed 11-32 cassette embodies Italian excellence in the service of road performance. Designed and manufactured in the historic Vicenza factory, this cassette represents the perfect balance between cutting-edge technology, durability, and versatility of use. With its 11-32 range, it offers cyclists an ideal gear range to tackle all types of terrain, from flat roads to demanding climbs, without compromising shifting fluidity.

Technical architecture and Campagnolo innovation

The Chorus 12s cassette employs a revolutionary architecture that allows 12 sprockets to be integrated within the same footprint as an 11-speed cassette. This technical achievement guarantees total compatibility with existing Campagnolo freehub bodies (9/10/11/12 speed) and current frames, without requiring any modification or hardware upgrade. The sprockets are machined from high-quality steel with a Nickel-Chrome surface treatment that significantly increases wear resistance and optimizes long-term smoothness of operation.

Technical highlights

• Three-sprocket monobloc clusters: The two largest three-sprocket clusters are machined from a single piece, completely eliminating energy dispersion and increasing rigidity by up to 180%. This patented construction also improves torsional resistance by 70% compared to individual sprockets.
• Optimized 11-32 range: One-tooth jumps up to the 7th sprocket (11-12-13-14-15-16-17), then progressive gradation (19-22-25-28-32) to maintain a consistent cadence in all circumstances. This versatile range is perfectly suited to hilly routes and demanding long rides.
• Ultra-Shift tooth profile: The tooth shape has been redesigned to reduce stress on the chain and facilitate upshifting onto larger diameter sprockets. The result: ultra-fast, precise, and silent gear changes, even under heavy load.
• Calibrated aluminum spacers: All spacers have identical thickness and are optimized for perfect chain alignment at all times, ensuring error-free assembly and maximum reliability.
• Controlled weight: Only 306 grams for this 11-32 variant, an exemplary weight-to-strength ratio that reflects Campagnolo craftsmanship.

Available variants

The Chorus 12-speed range offers three cassettes to suit all rider profiles and terrain configurations:

• 11-29 (CS20-CH1219): 310 g — Range 11-12-13-14-15-16-17-19-21-23-26-29. Ideal for rolling courses, racing, and cyclists seeking consistent cadence on flat to hilly terrain.
• 11-32 (CS20-CH1212): 306 g — Range 11-12-13-14-15-16-17-19-22-25-28-32. The versatile variant par excellence, offering a perfect compromise between gear range and preservation of the top cassette for accelerations and sprints.
• 11-34 (CS20-CH1214 / EAN 8053340454288): 306 g — Range 11-12-13-14-15-16-17-19-22-25-29-34. Designed for mountainous routes and challenging sportives, this cassette further expands the available gear range while remaining compatible with the Chorus 12s group only (not compatible with Record or Super Record 12s).

Compatibility and drivetrain integration

The Chorus 12s cassette absolutely requires the use of a Campagnolo 12-speed rear derailleur (mechanical) and a Campagnolo 12-speed chain. The reduced width of the chain links and the optimized spacing between sprockets are specifically calibrated for this drivetrain generation. It installs on any Campagnolo 9/10/11/12-speed freehub body with a supplied lockring. No frame or wheel modification is necessary: the total width remains identical to 11-speed cassettes, ensuring total backward compatibility.

Entirely manufactured in Italy

Like all Campagnolo components, this Chorus cassette is entirely designed, developed, and manufactured in the historic Vicenza factory, in Italy (Via della Chimica). Every stage of the process—from engineering to machining, through testing and industrialization—takes place within Campagnolo facilities. This total mastery guarantees impeccable quality control, absolute traceability, and compliance with the most demanding standards in the cycling industry. Campagnolo even develops its own tools, machines, and technologies to exclusively produce the best components on the market.

Summary and technical verdict

The Campagnolo Chorus 12s 11-32 is the reference cassette for demanding cyclists seeking absolute versatility without compromising shifting quality. Its thoughtful range, contained weight, and premium construction make it a top choice for equipping a high-performance road bike, whether dedicated to sportives, intensive training, or long-distance rides on hilly roads. Compatible with all Campagnolo 12-speed mechanical groups (Chorus, Record, Super Record), it integrates perfectly into a modern drivetrain while installing on existing wheels. A product with unmatched Italian craftsmanship, synonymous with reliability, precision, and longevity.