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Review on ๐Ÿšฒ Shimano Deore RD-M591: 9-Speed Mountain Bike Rear Derailleur for Optimal Performance by Yousef Abood

Revainrating 5 out of 5

Smooth shifting and easy adjustment.

I use this on a bike I built on a Mongoose Salvo frame. The bikes I use are freewheel, so 7 speed 12-28 freewheel. Installing the limit screws was easy and there were many adjustments. It is paired with a 22-32-42 crankset up front, a Shimano Altus derailleur and a Microshift derailleur. Switching is smooth and fast. I would recommend this switch.

Pros
  • Weight
Cons
  • I will add later