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The ULTEGRA ST-R8170 2x12 speed Dual Control levers with Wireless Di2 connectivity deliver a clean aesthetic and simple setup while reimagined ergonomics bring a new level of comfort and control.

• 2x12-speed Dual-Control lever with 4.6mm longer reach for increased security and control
  
• Refined hood for improved ergonomics and aerodynamics with improved button access
  
• SERVO WAVE technology enhances brake performance thanks to a faster initial bite point followed by a wider control area.
  
• Easy fit pre-bled J-Kit
  
• 1000mm SM-BH90 front hose or 1700mm SM-BH90 rear hose included
  ULTEGRA BR-R8170 hydraulic calipers are the most compact yet. Mono-body construction ensures light weight and rigidity, proving that good things can come in small packages.
  
• One-piece structure maximizes stiffness and reduces weight
  
• Maintenance-friendly ONE WAY bleeding process
  
• 10% wider pad clearance decreases the chance of rotor rub

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