rd m3100 alivio rear derailleur 9 speed shadow design sgs long cage

Great value alivio m3100 rear derailleur offering crisp performance on- and off-road for 9-speed drive trainsshadow design with smooth skid plate surface features a super low profile design that reduces the risk of damage from trail side hazardswide link design increases rigidity and service lifealloy body and outer link leads to lower weight without compromising strength and durability11-tooth pulleys for reduced pulley wear and chain noiseadvanced light action design with low friction fluorine coated link pivot bushingsfor use with 32 to 36 tooth low rear sprockets, total capacity 45 teethtop-normal swing designcompatible with 9-speed hyperglide sprockets