Brake Disc (Rotor)
The brake disc is the metal rotor attached to the wheel hub that the pads clamp to slow the car.
What is Brake Disc (Rotor)?
Discs are usually cast iron; vented discs have internal channels for cooling. A minimum thickness is stamped on the disc. Drilled and slotted discs are used in performance cars to help cooling and remove gas and debris.
How it works
The pads clamp the disc, and heat from friction is released into the air.
Why it matters for your car
Worn or uneven discs cause vibration and longer stopping distances. Discs are replaced in pairs on the same axle, often with new pads.
Other terms
- Alloy Wheel
- Belt Tensioner
- Build Date (Production Date)
- Crosswind Assist
- Dashboard (Dash Panel)
- Emergency Brake Signal (Flashing Brake Lights)
- Frunk (Front Trunk)
- Fuel Injector
- Jockey Wheel
- Ohm’s Law
- Pedestrian And Cyclist Detection
- Plastic Trim Restoration
- Pre-purchase Inspection
- Strobe Timing Light
- Subframe
- Universal Joint (U-joint)
- Variable Geometry Turbocharger (VGT)
- Vehicle-to-Home (V2H)
- Wheel Hub
- Yaw Rate Sensor