The R1 Concepts Geo-Carbon drilled-and-slotted rotor for 1998–2012 Sterling Acterra with hydro disc brakes is a rear right replacement for those years. It includes a drilled and slotted braking surface with Geo-Carbon construction and is intended for rear right fitment on compatible Acterra vehicles, suitable when replacing a worn rotor to restore the braking contact area.
R1 98-12 Sterling Acterra (Hydro Disc Brakes) Rear Right Drilled & Slotted Geo-Carbon Rotor