Master Cylinder/Caliper Bore Size

 

All else being equal…

  • Increasing the master cylinder bore diameter yields a shorter, harder pedal stroke with decreased clamping force at the brake pads.
  • Decreasing the master cylinder bore diameter, yields a longer, softer pedal stroke with increased clamping force at brake pads.
  • Increasing the caliper bore diameter, yields a longer, softer pedal stroke with increased clamping force at brake pads.
  • Decreasing the caliper bore diameter yields a shorter, harder pedal stroke with decreased clamping force at the brake pads.