Heavy duty Hone M600/M601 all-mountain rear derailleur with unique Freehub axle mounting system for added durability
Designed to absorb accidental impact without affecting shifting potential
Revolutionary mounting system fixes rear derailleur to hub axle
Low normal return spring enhances gear selection especially in varied terrain.
Top normal spring uses the spring to select higher gears, best suited to use with Rapidfire shifters
Cable tension saver prevents impact generated tension within shifting system
Must be used with FHM600 Freehub