+ Ultra-Shift technology with which each tooth is studied to optimize the up/down of gears; + Surface treatment with Nickel-Chrome to reduce sprockets/chain friction and extend the life of the set. The CAMPAGNOLO Chorus 11v cassette guarantees you a super smooth gear change and reliability at a really attractive price. This is from the top of the range Campagnolo with a price almost 2 times lower than the Record for a barely higher weight. - Compatible with Campagnolo 11-speed transmissions; - Available in 11/23, 11/25 and 12/29 versions; - Weight (manufacturer): 230 g." A high-performance cassette with the advantages of 11 speeds, namely a cassette better adapted to the mountain or better staged according to the profile of the race " René Mandri, Coureur Team {{site}} Saint-Etienne Loire. Teeth: 11/23: 11-12-13-14-15-16-17-18-19-21-23 11/25: 11-12-13-14-15-16-17-19-21-23-25 11/27: 11-1-1 2/13 US 14-15-17-19-21-23-25-27 11/29: 11-12-13-14-15-17-19-21-23-26-29 12/25: 12-13-14-15-16-17-18-19-5/6 UK -25 12/27: 12-13-14-15-16-17-19-21-23-25-27 12/29: 12-13-14-15-16-17-19-21-23-26-29