Brake Discs and Rotors: Complete Buying Guide

Brake discs (rotors) work together with brake pads to stop your vehicle. Choosing the right discs is essential for braking performance and safety.

Solid vs Vented Discs

Solid discs are a single piece of metal, suitable for light vehicles and rear axles. Vented discs have a channel between two surfaces that dissipates heat more effectively, making them ideal for front axles and heavier vehicles.

Drilled vs Slotted vs Blank

• Blank/Smooth: Standard OE design, quiet operation, even wear
• Drilled: Holes for heat and gas dissipation, sporty look, may crack under extreme use
• Slotted: Grooves that clean the pad surface, excellent for performance driving
• Drilled & Slotted: Maximum cooling and cleaning, best for track use

Materials and Coatings

Most discs are cast iron. Premium options include carbon-ceramic for high-performance vehicles. Coatings like Geomet or zinc plating prevent rust on the non-braking surface.

Minimum Thickness

Every brake disc has a minimum thickness stamped on the edge. Replace discs immediately if worn below this spec. Warped or vibration-inducing discs should also be replaced.