* Precision engineered XTR Shadow rear derailleur for the ultimate in shifting performance and durability - as used by elite off-road racers the world over! * 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 * Full carbon fibre inner and outer pulley cages * Cold forged alloy links and pivot body's leads to lower weight without compromising strength and durability * Four fluorine-coated link pin bushings make this one of the slickest shifting derailleurs 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 * Mega9, 8 & 7 speed compatible * Durable sealed bearing pulleys with low friction * Top normal spring uses the spring to select higher gears, best suited to use with Rapidfire shifters * GS cage should be used with single and double chainsets only * Weight 182 g for SGS