The R1 Concepts drilled-and-slotted black brake rotor for 2021–2025 Rivian R1S (rear left) is a replacement rotor specified for that wheel position. It includes the drilled-and-slotted braking surface and black finish noted in the listing, covering the rear-left fitment for Rivian R1S models within the stated years.
R1 22-25 Rivian R1S Rear Left Drilled & Slotted Black Brake Rotor