Ram 3500 SRW vs DRW: Complete Truck Body Guide

The Ram 3500 is one of the most popular work trucks in Texas for flatbed and service body upfitting — and it comes in both single rear wheel (SRW) and dual rear wheel (DRW) configurations, each with different payload ratings and body fitment considerations. Star Truck Equipment in Wharton, TX helps Ram 3500 owners throughout South Texas and Louisiana pick the right truck body setup.

Ram 3500 SRW vs DRW: The Key Differences

Ram 3500 SRW (Single Rear Wheel) — Available on Crew Cab and Mega Cab configurations. Payload up to ~3,990 lbs. Narrower rear stance (~77″). Better for light-duty upfitting, landscape bodies, or fleet trucks that prioritize maneuverability.

Ram 3500 DRW (Dual Rear Wheel / Dually) — Available on Regular Cab, Crew Cab, and Mega Cab. Payload up to ~7,680 lbs (6.7L Cummins diesel, highest rating in class). Wider rear stance (~96″). The industry standard for serious flatbed and service body work.

The Ram 3500 DRW Cummins diesel is the highest payload-rated half-ton/three-quarter-ton/one-ton pickup sold today, making it a go-to for demanding Texas work truck applications.

Ram 3500 Cab-to-Axle (CA) Measurements

CA length is key for body fitment on the Ram 3500:

  • Regular Cab (SRW or DRW): ~56″ CA or 84″ CA
  • Crew Cab (SRW or DRW): ~60″ CA
  • Mega Cab (DRW): ~56″ CA — note: short CA limits body length options

For 9′ flatbeds and full-size service bodies, the Ram 3500 Regular Cab with 84″ CA is the classic configuration. The Crew Cab 60″ CA can accept up to 9′ service bodies on some build specifications — confirm with your body installer before ordering.

Best Flatbeds for Ram 3500 SRW

For SRW Ram 3500 trucks, narrower 84″ wide flatbeds are the clean, proportional fit:

  • CM RD Flatbed — Available 8’6″ x 84″ width. Clean design, skirted sides, welded steel. Popular with ranchers running SRW Ram trucks.
  • Norstar SD — Heavy-duty steel flatbed, 84″ width available. Known for long service life in Texas ranch and contractor environments.
  • Pronghorn — Lightweight construction, available in ranch and contractor configs for SRW applications.

Best Flatbeds for Ram 3500 DRW

The Ram 3500 DRW is one of the best trucks in America for a full-size 9’4″ gooseneck flatbed. The massive payload capacity and wide stance handle the largest steel flatbeds available:

  • Bedrock Granite 9G — 9’4″ x 94″ DRW flatbed. 25,000 lb gooseneck coupler, heavy-duty 2″x6″ frame. Texas-popular, especially among ranchers and contractors pulling heavy goosenecks. One of the best pairings with the Ram 3500 DRW Cummins.
  • Norstar SD (94″ wide) — The heavy-duty companion to the Ram 3500. Available with gooseneck coupler. A favorite among South Texas and Louisiana ranch operators.
  • Bradford Built Flatbeds — Well-built, powder-coat finish, multiple styles. A solid premium option for the Ram DRW platform.
  • NXG Flatbeds — A newer brand gaining traction in Texas. Competitive pricing with quality construction — worth considering on the Ram 3500 DRW.

Service Bodies for Ram 3500 SRW vs DRW

The Ram 3500 is a popular service body platform, but the SRW vs DRW choice affects which body sizes and weight configurations work:

  • SRW service bodies: 84″-wide bodies, total payload (body + tools + cargo) must stay under ~3,500–3,800 lbs. Light to medium-duty service work.
  • DRW service bodies: Up to 94″ wide, heavier body permitted, and the Ram 3500 DRW’s massive payload rating means you can stack it with tools, parts bins, and compressors. This is the preferred configuration for heavy-service contractors, mechanics, and utilities.

Top service body options: RKI (made in Houston, TX) and STI offer both standard and heavy-duty configurations for Ram 3500 fitment.

Ram 3500 vs Ford F-350 for Upfitting

The Ram 3500 DRW Cummins diesel offers higher published payload than the comparable F-350 DRW Power Stroke in many configurations. If maximum payload is your priority, the Ram wins on paper. If you’re already a Ford shop or your business runs a mixed Super Duty fleet, the F-350 remains an excellent platform. Both trucks accept the same flatbed and service body brands — the installation dimensions are very similar.

Ready to Upfit Your Ram 3500?

Star Truck Equipment is one of South Texas’s leading truck upfitters for Ram 3500 trucks. We carry and install Bedrock, CM, Norstar, RKI, Bradford Built, NXG, and more. Call us at (979) 532-1486 or visit our Wharton, TX location at 2507 County Rd 231.

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