Dynamite Friction 604-40103 Disc Brake Rotor - Rear

Dynamite Friction Rear Rotor for Ram HD Trucks

The Dynamite Friction DFC GEOSPEC Coated Rotor, part number 604-40103, is a rear disc brake rotor built for select Dodge Ram heavy-duty applications. It features a vented design with a 352.5 mm outside diameter, 30 mm nominal thickness, and a 28.39 mm discard thickness for service-focused brake replacement.

The GEOSPEC coated rotor line is built around corrosion-resistant surface protection, making it a practical choice for rear brake service on Dodge Ram 2500 and Dodge Ram 3500 trucks, as well as select Dodge Ram 1500 Mega Cab 8-lug models.

Key Features

• Rear disc brake rotor for select Dodge Ram applications
• DFC GEOSPEC coated rotor finish for added surface protection
• Vented rotor design for rear brake service
• Outside diameter: 352.5 mm
• Nominal thickness: 30 mm
• Discard thickness: 28.39 mm
• Height: 131 mm
• Inside diameter: 123 mm
• Bolt hole quantity: 8
• Bolt hole diameter: 17 mm

Product Details

Part number 604-40103 is a rear brake rotor engineered for vehicles that use an 8-bolt hub pattern and a vented rotor configuration. The coated surface helps protect the rotor from corrosion during storage and everyday exposure, which is especially relevant for trucks that see wet, salted, or high-moisture driving conditions. This rotor is listed for 2003-2008 Dodge Ram 2500 rear, 2003-2008 Dodge Ram 3500 rear, and 2006-2008 Dodge Ram 1500 rear with 8 lug wheels and Mega Cab configuration.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear brake rotor wear and thickness loss
• Brake pulsation caused by rotor surface irregularity
• Corrosion on exposed rotor surfaces
• Brake noise related to worn rear rotors
• Service replacement for Dodge Ram rear brake maintenance

Installation Notes

Verify rotor dimensions, hub fitment, and rear axle application before installation. Confirm the vehicle is a 2003-2008 Dodge Ram 2500 rear, 2003-2008 Dodge Ram 3500 rear, or 2006-2008 Dodge Ram 1500 rear with 8 lug wheels and Mega Cab configuration. Clean the hub mounting surface before installing the new rotor, and inspect pads, calipers, and hardware condition during brake service. Part number 604-40103 should be matched to the rear position only.

Quality Assurance

Dynamite Friction’s DFC GEOSPEC Coated Rotor line focuses on corrosion protection and OE-style brake service fitment for truck applications. Use the published dimensions and vehicle listings to confirm correct application before purchase.