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Shimano Ultegra R8170 Disc Brake Rear Caliper


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Product ID: 1477265

Shimano Ultegra R8170 Disc Brake Caliper Rear

The Shimano Ultegra R8170 Disc Brake Rear Caliper offers fantastic stopping power in a compact and lightweight design, ideal for premium bike builds. The oversized 22mm ceramic pistons and aluminium radiation fin pads provide good heat insulation and dissipation for consistent, fade-free performance on long descents whilst the opposed 2-piston design increases control and modulation. 10% more pad clearance reduces the potential for rubbing on the rotor and makes wheel changes easier.

There is a separate bleed port and valve screw with a one way internal fluid circuit to make bleeding the system easier and the use of non-corrosive mineral oil also helps make the process less complicated. The caliper is supplied without a rotor or adapters, but is compatible with 140mm or 160mm rotors with the appropriate adapter.


  • Ultegra hydraulic road disc brake offers an ideal balance of light weight and efficient braking, making it the perfect choice for both enthusiast and competitive riders
  • Oversized 22mm ceramic pistons optimised for heat insulation, lightweight and stiffness
  • Opposed 2-piston design reduces leading effect and optimal pad wear increases braking control
  • Increased pad to rotor clearance reduces the chance of rotor drag
  • Direct flat mount and open design allows easy and quick wheel replacement
  • Forged calliper design is lightweight and rigid
  • One way internal fluid circuit makes bleeding easy
  • Mineral oil brake fluid is non-corrosive and less hazardous than conventional hydraulic brake fluid
  • Shim-less mounting bracket allows for quick installation and setting up
  • Recommended for use with Ice Tech FREEZA Center Lock SM-MT800 rotors for optimum braking performance
  • Comes complete with resin compound aluminium radiation fin pad that further improves heat dissipation, reducing brake surface temperature by 50°C
  • Inline hose routing for low profile design
  • Separate bleed port and valve screw for improved bleeding process

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