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Brakes

Brake Fluid

Hydraulic fluid transmitting pedal force; rated by dry and wet boiling points.

Definition

DOT 4 and DOT 5.1 fluids resist fade better under track heat.

Fluid should be flushed periodically because it absorbs moisture over time.

Related terms

  • Brake CaliperA hydraulically actuated clamp housing pistons that squeeze pads against a rotor
  • Brake RotorA disc rotating with the wheel that pads clamp to create friction and slow the v
  • Brake PadFriction material pressed against the rotor to convert kinetic energy into heat.
  • Master CylinderThe hydraulic pump converting brake pedal force into fluid pressure for calipers
  • ABSAnti-lock braking system pulsing pressure to prevent wheel lockup under hard bra
  • Brake BiasThe front-to-rear distribution of braking force during pedal application.

Category: Brakes · Updated August 31, 2026