Campagnolo: The new Chorus groupset is fully compatible with the cassettes launched with the Super Record and Record 2x12-speed groupsets (11-29 and 11-32) and it introduces a new cassette specification (11-34) that will benefit the entire range of 12-speed mechanical drivetrains from now on. The new 11-34 cassette in fact offers cyclists even more versatility and greater choice and autonomy in terms of available gears. Mechanical groupsets with 12-speed transmission now therefore offer a total of three cassette options (11-29, 11-32, 11-34). Same width as the 11-speed cassetteTotally compatible with wheels and frames.The two bigger sets of three in a single-block pieceIt eliminates energy dispersion.Surface treatmentIt increases durability and improves smoothness.Same-thickness spacersEnsures error-free fitting.Three specifications availableIt increases the range of action thanks to a complete assortment of gear inch ratios: 11-12-13-14-15-16-17-19-21-23-26-29 11-12-13-14-15-16-17-19-22-25-28-32 11-12-13-14-15-16-17-19-22-25-29-3425-29-34 set of three available as a spare partCan be updated from the 11-32 cassette