R1 Concepts 623-21051R RNC Series Drilled Brake Rotor

The R1 Concepts 623-21051R RNC Series Drilled Brake Rotor is a direct-fit, performance-oriented replacement rotor engineered to deliver confident, consistent stopping power. Precision-drilled holes across the rotor face help evacuate heat, gas, and debris from the braking surface, reducing brake fade during repeated or heavy stops and extending pad life.

Manufactured from high-carbon grey iron, this rotor provides excellent thermal conductivity and resistance to cracking under stress. The rotor arrives with a corrosion-resistant coating on the non-swept surfaces to resist rust and preserve appearance, while the braking surface is left uncoated for immediate, optimal pad contact.

Key Features:

• Precision-drilled rotor face for improved heat dissipation and gas venting
• High-carbon grey iron construction for superior strength and thermal management
• Corrosion-resistant coating on hats and non-contact surfaces
• Direct OE-replacement fit — no modifications required
• Balanced and tested to minimize vibration and pulsation
• Meets or exceeds OEM specifications for dimensions and performance

The R1 Concepts RNC (Drilled) rotor is an ideal upgrade for drivers seeking improved braking performance over a standard OEM replacement, offering the benefits of a performance rotor at an accessible price point.