Keep your truck's rear brakes stopping smoothly with the DYNAMIC FRICTION brake rotor (P/N 604-40122, also written 60440122). This GEOSPEC coated disc brake rotor drops in as a direct-fit rear replacement for the 2019-2026 RAM 3500 and the 2019-2026 RAM 4000. See the Buyer's Guide tab for engine-level fitment.
Cast from premium G3000/G11H18 iron for strength, stability, and durability, this rotor is designed to meet the same form, fit, and function as OEM brake rotors. It arrives ready to install with no additional pre-degreasing preparation needed, saving time during the job. Sold individually — replacing both rear rotors together as a matched pair is recommended for even, balanced braking.
What is the Dynamic Friction brake rotor 604-40122?
It's a GEOSPEC coated rear disc brake rotor that replaces a worn, warped, or corroded original rotor on the listed applications.
Does this rotor fit my vehicle?
It's a direct-fit rear replacement for the 2019-2026 RAM 3500 and 2019-2026 RAM 4000. Check the Buyer's Guide tab to confirm engine-level fitment for your truck.
What is this rotor made of?
It's cast from premium G3000/G11H18 iron castings for strength, stability, and durability, and CNC-machined to tight tolerances.
What does the GEOSPEC coating do?
It provides corrosion protection superior to zinc and conventional painting. The rotor also ships ready to install with no pre-degreasing preparation needed.
Do I need to replace both rear rotors?
This rotor is sold individually. Replacing both rear rotors together as a matched pair is recommended for even, balanced braking, though not strictly required.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
