Chorustm Rear Derailleurs Carbon fibre immediately indicates a component's competitive spirit. So just imagine if the component in question is the very soul of the racing bike the rear derailleur.The carbon front link says it clearly the Chorustm groupset is designed for racing. Available with a short or medium cage, to interface perfectly with double and compact cranksets. Forged aluminium bodies Weight savings and long fatigue life Carbon outer plate Light, long fatigue life, c
)
