Ford F-350 SRW vs DRW: Choosing the Right Truck Bed Setup

The Ford F-350 Super Duty is available in both single rear wheel (SRW) and dual rear wheel (DRW) configurations — and that choice has a big impact on which truck bodies fit and how they perform. If you’re buying an F-350 to mount a flatbed, service body, or crane body, understanding the SRW vs DRW difference is the first decision you need to make. Star Truck Equipment in Wharton, TX helps customers across Texas and Louisiana spec the right setup every day.

What Is SRW vs DRW on an F-350?

SRW (Single Rear Wheel) — One tire per side on the rear axle. Narrower rear track width (~77″). Lower payload capacity (~3,000–3,700 lbs depending on configuration). Better for standard use, light hauling, and setups where maneuverability matters.

DRW (Dual Rear Wheel / “Dually”) — Two tires per side on the rear axle. Wider rear track width (~96″). Higher payload capacity (~4,200–4,700 lbs depending on configuration). Required for maximum gooseneck and 5th wheel towing, and recommended for heavy flatbed and full-size service body builds.

F-350 Cab-to-Axle (CA) Measurements for SRW and DRW

CA length determines which body sizes fit your truck. On the F-350:

  • Regular Cab SRW: 56″ or 84″ CA
  • SuperCab SRW/DRW: 56″ or 84″ CA
  • Crew Cab SRW/DRW: 60″ or 84″ CA

For flatbeds: 84″ CA accommodates 8’6″ and 9’4″ bodies. 60″ CA is best with 7’6″ or 8′ bodies. For service bodies: the 84″ CA is standard for full-size 9′ service bodies.

Best Flatbeds for Ford F-350 SRW

If you’re running an F-350 SRW, you’ll want a flatbed that matches the narrower rear track. Standard body width of 84″–88″ works well on SRW trucks. The body should NOT overhang the rear wheels excessively. Top picks:

  • CM RD or CM SK — Available in 8’6″ x 84″ or 8’6″ x 94″ widths. The 84″ width is ideal for SRW trucks.
  • Norstar SD — Heavy-duty steel flatbed in SRW-friendly widths. Great for ranch and contractor use.
  • Pronghorn — Lightweight options available, good for SRW payload management.

Best Flatbeds for Ford F-350 DRW

The DRW F-350 can handle a wider and heavier flatbed thanks to the increased payload capacity and wider stance. Standard body width of 94″–96″ is common on DRW trucks. Gooseneck capability is a major advantage of the DRW setup. Top picks:

  • Bedrock Granite 9G — The 9G is built for DRW trucks. Features a 25,000 lb gooseneck coupler, heavy-duty 2″x6″ frame, and wide 94″ deck. One of the most popular choices in Texas.
  • Norstar SD (94″ wide) — Wide deck with full gooseneck compatibility. Excellent for heavy hauling and livestock work.
  • Bradford Built Flatbeds — Powder-coat finish, multiple configurations. Well-suited for DRW trucks with high towing demands.

Service Bodies: SRW vs DRW Considerations

Most service bodies are designed to fit both SRW and DRW trucks, but there are key differences:

  • SRW service bodies are typically 84″ wide to keep the wheel well fenders clear. Total weight is limited to the SRW payload cap (~3,500 lbs for a well-equipped service body + tools + parts).
  • DRW service bodies can be wider (94″) and heavier. The added payload means you can spec more toolbox compartments and carry more parts/equipment without exceeding GVWR.
  • RKI and STI both offer service bodies sized for both configurations — call us to confirm the right fitment for your specific cab and wheelbase.

When to Choose SRW vs DRW on an F-350

  • Choose SRW if: You need to navigate tight jobsites, park in standard spaces, or your payload needs are under 3,500 lbs. Also a better choice for landscape bodies or lighter contractor work.
  • Choose DRW if: You’re pulling a gooseneck trailer, running a heavy flatbed with a full load, mounting a full-size service body, or need maximum payload capacity. DRW is the industry standard for serious work truck upfitting in Texas.

Get Expert Advice from Star Truck Equipment

Not sure whether SRW or DRW is right for your application? Call Star Truck Equipment at (979) 532-1486. We’ve helped hundreds of Texas contractors, ranchers, and fleet managers spec the right truck and body combination. Our Wharton, TX shop carries and installs Bedrock, CM, Norstar, RKI, Bradford Built, and more.

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