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  • Di2 E-Tube Electronic Shifting
  • Sleek integrated appearance
  • New low-profile design
  • Race endurance
  • Optimized slant angle
  • Wide compatibility
  • RD-SS covers: 11-25T to 11-30T
  • RD-GS covers: 11-28T to 11-34T
  • Maintain race concentration with more intuitive shift control
  • System communication with front derailleur
  • SHIMANO Synchronized Shift
  • Maximum Low Sprocket: 30T (SS); 34T (GS)
  • Minimum Top Sprocket: 11T
  • Maximum Front Tooth Difference: 16T
  • Total Capacity: 35T (SS); 39T (GS)
  • Weight: 242g. (SS type), 249g. (GS type)
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