Nearly every F-350 service body customer asks the same question: do I need duals? It is the right question, because the answer changes the body you can order, the payload you can legally carry, and how the truck works on a jobsite. Here is the practical breakdown we walk through with buyers in Wharton every week.

The core difference

Factor	F-350 SRW	F-350 DRW
Typical GVWR	~11,500 lb	~14,000 lb
Max payload (properly equipped)	~4,300–4,900 lb	~6,500–7,800 lb
Body width required	SRW-specific (narrower)	DRW-specific (wider over fenders)
Gooseneck towing	up to ~28,000 lb	up to ~38,000 lb
Loaded stability with a tall body	Good	Noticeably better
Tire cost / replacement	4 tires	6 tires
Tight-site maneuvering	Easier; fits standard parking	Wider; watch curbs and gates

Choose DRW if any of these are true

• You carry a compressor, welder, or a crane/davit of any size
• You run a full plumbing, electrical or HVAC inventory plus material
• You tow a gooseneck — pin weight of 3,000–5,000 lb lands on the truck’s payload
• Your loaded weight already puts an SRW truck near its door-sticker GVWR
• You want the body to sit stable on uneven ranch or oilfield ground

Choose SRW if any of these are true

• Most of your load is hand tools, fittings and light stock
• You work residential driveways, downtown streets or parking garages daily
• The truck doubles as a personal vehicle
• You want lower tire and maintenance cost over the life of the truck

Body fitment: this is not adjustable later

Service bodies and skirted flatbeds are manufactured in SRW and DRW widths. A DRW body on an SRW truck leaves the fenders overhanging and looks (and handles) wrong; an SRW body will not clear dual tires at all. Confirm your wheel setup and your cab-to-axle before ordering. On the F-350 pickup, the 6’9″ short bed generally corresponds to a 56″–60″ CA frame and an 8–9 ft body; the 8′ long bed and cab & chassis run 60″–84″ CA and take 9–11 ft bodies.

Payload math with a real body on it

A 9 ft steel service body is roughly 1,700–2,200 lb installed. Put that on an SRW F-350 with about 4,600 lb of payload and you have ~2,500 lb left for tools, material, fuel and two crew — which a stocked plumbing or electrical body will consume quickly. The same body on a DRW F-350 leaves 4,500–5,500 lb. That margin is the entire argument for duals.

Which bodies we recommend for each

For SRW F-350s we most often fit an RKI 9 ft steel service body or a lighter skirted bed from Norstar. For DRW trucks, CM SK and RKI 11 ft bodies are the workhorses, and they leave room to add a crane-ready compartment later. Browse the full service body lineup or our truck beds if you want an open deck instead.

Cost difference

A DRW F-350 typically costs modestly more than an equivalent SRW truck, and the body itself is usually within a few hundred dollars either way. The bigger long-run number is tires and the cost of outgrowing the truck. If you are genuinely on the fence, ask yourself whether you will add a crane, compressor or gooseneck within three years. If yes, buy DRW now.

Get a Real Quote — Installed, Not Estimated

Not sure which one your sticker allows? Text us a photo of your door jamb sticker. Star Truck Equipment is at 2507 County Rd 231 in Wharton, TX, about an hour southwest of Houston. We stock beds and bodies from Bedrock, CM, Norstar, NXG, Pronghorn and RKI, and most in-stock installs are done in one business day. Call (979) 532-1486 with your year, make, model, cab-to-axle and wheel setup and we’ll tell you exactly what fits and what it costs installed — or browse current inventory.