Microshift Rear Derailleur - R9 RD-R42S - 2 x 9/10 Speed - Short Cage - 11-28T (Shimano Road)

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R9 Rear Derailleur 9 Speed Long Cage
With a competitive weight and an aluminum bracket body and outer link, R9 marries form and function beautifully.


  • Weight saving aluminum bracket body and outer link
  • Steel cage

If you know a bike mechanic that’s been around for a while, you may notice that they sometimes get a little nostalgic for 9-speed drivetrains. 9-speed is super versatile, easy to adjust, and tolerant of all kinds of abuse. R9 embodies that versatility and durability. With a wide variety of shifter, derailleur, and cassette options, you can use R9 to set up a road bike almost any way that you want. It also slots in easily as a replacement parts if your existing drivetrain wears out or breaks. It’s not fancy, but sometimes normal is exactly what you’re looking for.

Speed 2 x 9/10
Cage Length Short Cage
Max Cog 25-28T
Chain Capacity 33T
Cage Material Steel
Outer Link Material Aluminum
Compatibility Shimano Road
Weight 265g


Barcode # 4710495436098
Brand Microshift
Shipping Weight 0.3000kg
Type Derailleurs

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