A cab and chassis truck gives you a bare frame behind the cab, which means the flatbed you choose determines your final capability just as much as the truck itself. For Texas ranch, ag, and construction buyers, picking the right chassis cab up front saves headaches at install time. Here’s how the most common options stack up.
Chassis Cab Comparison for Flatbeds
| Chassis Cab | GVWR | Common CA | Typical Flatbed Length |
|---|---|---|---|
| Ford F-350 SRW | 11,500–14,000 lbs | 60″–84″ | 8’6″–9’4″ |
| Ford F-350 DRW | 14,000 lbs | 60″–84″ | 9’4″–11’4″ |
| Ford F-450 DRW | 15,000–19,500 lbs | 60″–84″ | 9’4″–11’4″ |
| Ram 3500 DRW | 14,000 lbs | 60″–84.75″ | 9’4″–11’4″ |
| Ram 4500 | 16,500 lbs | 60″–84.75″ | 9’4″–11’4″ |
How to Choose the Right Chassis
If you’re hauling hay, feed, or moderate equipment loads and want to stay within a standard pickup insurance and license class, an F-350 or Ram 3500 DRW chassis cab gives you real payload without stepping up to a commercial-class truck. If you’re regularly hauling heavier loads — skid steers, larger round bales, or oilfield equipment — the extra GVWR of an F-450 or Ram 4500 gives you meaningful breathing room before you hit the axle rating.
Matching Flatbed Brand to Chassis
- CM Truck Beds — RD and SK models fit F-350 through F-450/Ram 4500 chassis cabs, widely available and quick to install
- Bedrock — Diamond and Granite series flatbeds built for heavy ranch and ag use on DRW chassis
- Norstar — steel flatbeds in a range of CA lengths, popular for utility and ranch trucks
SRW vs. DRW: Which Chassis Cab Should You Order?
Chassis cabs are available in SRW on the F-350, but the overwhelming majority of flatbed builds we install are on DRW chassis. Dual rear wheels give you the GVWR and stability to actually use the flatbed’s rated capacity — an SRW chassis cab flatbed looks the same but can leave 1,000+ lbs of usable payload on the table. If your dealer offers you an SRW chassis cab for a flatbed build, ask about the GVWR difference before you sign.
Get the CA Measurement Right the First Time
Cab-to-axle (CA) measurement is the single most important number when ordering a chassis cab for a flatbed. Order the wrong CA and your flatbed either overhangs the frame or leaves a gap at the cab. We always confirm CA against the manufacturer’s build sheet before recommending a flatbed length — it’s the difference between a clean install and a rework.
📞 Call Star Truck Equipment at (979) 532-1486 — we’re in Wharton, TX and help Texas ranch, ag, and construction buyers spec the right chassis cab and flatbed combination the first time.