NEW Campagnolo CHORUS ULTRA-Shift 11 speed Cassette & lockring. Compatible with ALL 11 speed Campagnolo drivetrains. Chorus provides the same cog design and smooth shifting as Super Record and Record cassettes, with much better value.
https://flic.kr/p/Zntk7J | De Rosa SK Pininfarina Luxury Edition | Campagnolo Chorus and Bora 50 One Clincher
A 112 mm bcd for the small chainring and a 145 mm bcd for the large help to keep each one as stiff as possible. Campagnolo's high precision steel bearings have provided smooth spinning drivetrains for decades and have an extremely low rollingresistance.