R1 Concepts 631-92015L RNC Drilled Slotted Disc Brake Rotor

The R1 Concepts 631-92015L RNC Brake Rotor is a premium drilled and slotted disc brake rotor engineered to deliver superior stopping performance over stock replacement rotors. Featuring a cross-drilled and slotted surface pattern, this rotor is built for drivers who demand more from their braking system — whether on daily streets or demanding driving conditions.

Key Features:

• Cross-Drilled Holes: Reduce heat buildup and allow gases to escape from the pad-to-rotor contact surface, improving bite and fade resistance
• Diamond Slots: Continuously sweep debris, dust, and moisture from the braking surface for consistent, reliable stopping power
• Silver Zinc Coating: Protects the non-braking surfaces (hub, vanes, and hat) from corrosion for improved appearance and longevity
• Precision Machined: Manufactured to strict tolerances to ensure smooth, vibration-free braking and proper fitment
• Direct Bolt-On Fitment: Designed as a direct replacement requiring no modifications for a straightforward installation
• High-Carbon Iron Construction: Provides excellent thermal capacity and durability under repeated braking cycles

Important Break-In Note: Upon initial receipt, the rotor braking surface is covered with a protective silver zinc coating. This coating will wear off during the break-in (bedding) process as the brake pads seat against the rotor — this is completely normal and expected.

The R1 Concepts 631-92015L is sold as a single rotor. For optimal braking performance and even wear, it is recommended to replace rotors in axle pairs and follow the R1 Concepts brake rotor and pad break-in procedure after installation.