PowerStop AR85121XPR Disc Brake Rotor Set - Rear

Overview

PowerStop AR85121XPR is a rear drilled and slotted brake rotor set built for direct OE fitment and straightforward replacement. It is compatible with Ram 4500 and Ram 5500 rear brake applications across the listed model years, including Dodge Ram 4500 and Ram 5500 coverage.

Key Features

• Drilled and slotted rotor surface helps manage heat, gas, dust, and moisture.
• Silver zinc dichromate plating adds rust and corrosion resistance.
• Vented rotor construction supports heat dissipation under demanding braking.
• Direct OE fit reduces the need for special modifications.
• Part number AR85121XPR for easy identification and ordering.

Detailed Description

Power Stop AR85121XPR uses a slotted X-drilled design to promote cleaner rotor contact and more consistent braking performance in severe conditions. The vented construction and 15.40-inch outside diameter support thermal management, while the zinc-plated finish helps protect the rotor surface from corrosion. This part cross-references Centric Parts 120.67078 and Raybestos Brakes 781830 for the same application. For buyers searching for a Ram 4500 rear brake rotor set or a Ram 5500 rear drilled and slotted rotor replacement, AR85121XPR provides a direct-fit solution with OE-style installation.

What It Helps Address

• Brake fade from heat buildup during repeated stops.
• Surface contamination from dust, gas, and moisture.
• Rust formation on exposed rotor surfaces.
• Fitment issues caused by non-OE dimensions or mounting patterns.
• Uneven rotor contact that can affect braking feel.

Installation Notes

Compatible With rear brake applications only. Verify rotor dimensions, bolt circle diameter, and stud or lug hole count against the existing part before installation. The direct OE fit is intended to simplify replacement on Ram 4500 and Ram 5500 rear brake systems, including Dodge Ram 4500 and Ram 5500 applications listed in the fitment data.

Quality Assurance

Power Stop designs this rotor set as a bolt-on upgrade with OE fitment and corrosion-resistant plating. The AR85121XPR part number identifies the drilled and slotted rear rotor application covered here.