Dorman 929-921 Coil Spring - Rear

Heavy-Duty Rear Coil Springs for Ram 1500

Dorman 929-921 rear coil springs are built for Ram 1500 and Ram 1500 Classic trucks that see regular hauling and load-carrying duty. This XHD spring set uses 5160H alloy steel, a constant spring rate, and a powder-coated metallic grey finish to support heavier rear loads while helping maintain ride control.

Key Features

• Extra-heavy-duty rear coil spring design with a 70% increase in load handling capability over the vehicle’s nominal spring rate
• Fits 2019-2024 Ram 1500, rear, standard rate
• Fits 2019-2024 Ram 1500 Classic, rear, standard rate
• 5160H alloy construction for strength in demanding suspension service
• Constant spring rate for predictable rear suspension response
• Powder-coated metallic grey finish for added corrosion resistance
• OE lift: +2.8 in
• Part number: 929-921

Detailed Description

Dorman 929-921 is an extra-heavy-duty coil spring replacement for rear suspension applications on Ram 1500 and Ram 1500 Classic models. The spring geometry includes a semi-closed plain end at one side and a pigtail over-center end at the other, with no seat included. Built from 5160H alloy steel and finished in powder coat, this rear coil spring set is engineered for trucks used in continuous heavy hauling conditions where consistent load support matters. For buyers searching for rear coil springs for 2019-2024 Ram 1500 standard rate applications, 929-921 provides a direct suspension upgrade path.

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

What It Helps Address

• Rear sag from frequent cargo or towing loads
• Reduced ride height under sustained hauling
• Unstable rear suspension response with worn springs
• Excessive driver fatigue from inconsistent load control
• Handling changes caused by weakened factory rear coils

Installation Notes and Tips

Verify rear suspension fitment by year, model, and standard-rate application before installation. Inspect related suspension components, including mounts and isolators, for wear before replacing the springs. Because this spring set is engineered for a higher load-handling rate, confirm that the vehicle’s rear suspension setup matches the intended use case for heavy-duty service. Part number 929-921 is listed for rear installation only on the Ram 1500 and Ram 1500 Classic applications shown.

Quality Assurance

Dorman designs this coil spring set as a suspension-grade replacement using 5160H alloy material and a powder-coated finish for durability in demanding truck service. The XHD suspension grade and constant-rate construction support consistent performance in heavy-haul rear suspension applications.