R1 Concepts 613-31135L RNC Series Slotted Brake Rotor

The R1 Concepts 613-31135L is a RNC Series slotted brake rotor engineered for drivers who demand consistent, fade-resistant stopping power. Manufactured to OEM or better dimensional tolerances, this rotor delivers a direct-fit replacement with enhanced performance characteristics over a standard smooth rotor.

The precision-cut slots along the rotor face continuously sweep away gas, dust, and debris from the brake pad surface, maintaining a clean contact patch for more consistent bite and improved modulation under repeated braking. The rotor is produced from high-carbon grey iron for excellent heat absorption and dissipation, reducing brake fade during spirited driving or demanding stop-and-go conditions.

Key Features:

• Slotted rotor design evacuates gas and debris for consistent pad-to-rotor contact
• High-carbon grey iron construction for superior heat management and reduced vibration
• OE-matched dimensions for a direct bolt-on installation — no modifications required
• Corrosion-resistant coating on non-friction surfaces to resist rust and improve appearance
• Precision balanced to minimize vibration and pedal pulsation
• Left-side fitment (designated by the "L" suffix) for correct directional slot orientation

R1 Concepts designs its RNC rotors for street and performance driving applications, making this an excellent upgrade or replacement for the factory rotor. The 613-31135L is the left-side rotor and should be paired with its right-side counterpart for a complete axle replacement.