Disk Surface Finish


Open Slot Slotted Only Drilled & Slotted
Open Slot*
Open Slot
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US Patent #:
*Currently available only for two-piece rotors.
  • Has the advantages of both drilled & slotted rotors
  • Allows the disc to expand and contract and prevents the disc from cracking or warping
  • Increasing cooling area and retains more friction surface
  • Slots relieves thermal stress
  • Slots are self cleaning and the pad build up will not clog the slots and are exhausted via the rotor edge keeping the disc surface clean
  • Reduces brake pad dust buildup and keeps the wheel clean through vacuum effect
  • Cost more to produce
  • Patented design (US Patent #: 7097007)
  • This design optimizes the friction between the pads and disc surface and achieves the highest level of braking performance that no other designs can provide.
  • Minimal brake dust build up on wheels

rb 2 piece rotor

Open Slot Slotted Only Drilled & Slotted
Slotted Only
Straight Slot
  • Helps the gas to escape
  • Keeps disc surface cleaner
  • Easy to produce
  • Debris builds up and clogs the slot

    Debris Buildup

Preferred by track racers because slotted rotors are less likely to crack than cross-drilled rotors.


Open Slot Slotted Only Drilled & Slotted
Drilled or Drilled & Slotted
Drilled & Slotted
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  • Provides better cooling and pad bite
  • Gives "racer's" look
    • Reduces friction surface
    • Pads wear out faster
    • Cracks tend to form around drilled holes under hard braking or track racing

Debris Drilled & Slotted

Rotors with drilled holes should only be used for street driving, as these rotors may tend to crack under repeated hard braking or in track racing. When choosing a drilled rotor, be sure that you do NOT choose a rotor that was drilled from an aftermarket blank (like many rotors on the market), as these rotors will not be balanced. All RacingBrake rotors are dynamically balanced as their last step, after slotting and/or drilling to ensure even distribution of mass.