Tough&44; aggressive & light weight All-Mountain SLX rear derailleur using revolutionary features from XT & XTR at an affordable price point Shadow features a super low profile design that reduces the risk of damage from trail side hazards Single tension spring prevents contact with the chainstay resulting in a silent ride Direct cable routing prevents snagging from any trail side hazards Alloy & steel construction leads to lower weight without compromising strength & durability Two fluorine-coated link pin bushings aid slick shifting on the trails High rigidity wide outer link braces the pulley body to increase pivot joint rigidity resulting in a crisp shift Strong return spring for a positive shifting feel GS cage should be used with single & double chainsets only Mega 9&44; 8 & 7 speed compatible For use with 32 or 34 tooth rear sprockets&44; total capacity 35 teeth Top normal spring for use with Rapidfire shifters Average weight 254 grams (GS)