The shimano deore m592 shadow 9 speed rear derailleur is ideal for trail or all mountain biking this rear mech benefits from a top normal spring design and in high gear the derailleur has a profile that is a 15mm less than a traditional rear derailleur the derailleur body has a stronger spring providing greater stability and the redesigned bracket axle keeps the derailleur body from contacting the chainstay shimano deore m592 shadow 9 speed rear derailleur features top normal spring d