R10 Medium Cage Silver Rear Derailleur

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2x9/10 speed
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Position Rear
Attachment Direct
Speeds 9&10-speed
Compatibility Shimano Road 10-speed (105, Tiagra 4600)


R10 Rear Derailleur for 2 x 9/10 Speed. Full Aluminum.

This is for a 34-tooth cassette, but as long as you're on a double and within capacity for the derailer, you may be able to go up to 36-tooth. For example, on a Bassi Classic Compact Double. Yes, we made that crank to fit these exact specs. It's a wonderful system.


  • Cassette Compatibility : 10/9 Speed
  • Max Sprocket : 30-34T
  • Min Sprocket: 11T
  • Total Capacity: 39T
  • Weight : 220g
  • Compatibility : All Shimano indexed 9 and 10-speed; Tiagra 4600
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