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Bike drivetrain refresh has a name, and it's Shimano Altus RD-M370, 9-Speed Rear Derailleur. Slap this one on your older MTB and get no-nonsense shifting and chain retention, just how it's supposed to be. Nine is fine!
Low Profile Derailleur Cage – Reduces collection of debris and potential for damage.
Stronger Return Spring for Crisp Shift Feeling
Drivetrain Speeds – 9
Largest Cog – 34t
Rear Derailleur / Shifter Compatibility – All Shimano 9-Speed HG Cassettes, 9-Speed Mountain Shifters, and 9-Speed Chains.
Long Cage