Dynamic Friction 4812-21137 GeoSpec Coated Plain Disc Brake Rotors - Pair

The Dynamic Friction Company 4812-21137 GeoSpec Coated Plain Disc Brake Rotors deliver OE-quality stopping performance with superior corrosion protection.

Each rotor arrives fully coated inside and out, processed dry, and ready to install straight out of the box — no degreasing or additional preparation required. The GeoSpec coating is safely swept away by the friction material during the normal bed-in process, with no harmful effects on pad or rotor surfaces.

Key Features:

• Engineered with premium G3000/G11H18 iron castings for strength, stability, and long-term durability
• OE vane configuration for proper and maximum heat dissipation
• CNC-machined to tight tolerances for consistent, reliable performance
• 100% precision cut and mill-balanced for smoother stopping and zero vibration at any speed
• Non-directional surface finish promotes faster, more even brake pad bed-in and quieter stops
• Designed to match the same form, fit, and function as OEM brake rotors
• Full GeoSpec coating (inside and out) provides superior rust resistance over zinc and conventional paint
• Ready to install — no cleaning or pre-degreasing needed
• No modifications required for direct-fit installation
• Quality tested at a 100% inspection station to ensure all critical attributes meet spec

An average brake job takes approximately 1.25 to 2.5 hours per axle.