Ram 3500 Tradesman Cab & Chassis: The Ultimate Flatbed Foundation
The Ram 3500 Tradesman cab and chassis is one of the most popular work truck platforms in Texas. Stripped of the pickup bed, it gives you a clean, empty frame to mount the exact truck body your business needs — flatbed, service body, crane body, or landscape bed. The Tradesman chassis delivers the payload capacity and cab-to-axle (CA) length to do it right.
At Star Truck Equipment in Wharton, TX, we spec and install bodies on Ram 3500 Tradesman chassis cabs regularly. Here’s what you need to know before you buy.
Ram 3500 Tradesman Cab & Chassis — Key Specs
| Spec | SRW | DRW |
|---|---|---|
| GVWR | ~11,500 lb | ~14,000 lb |
| Max Payload (chassis) | ~4,500 lb | ~6,500 lb |
| Engine | 6.7L Cummins Diesel | 6.7L Cummins Diesel |
| Transmission | Aisin 6-speed auto | Aisin 6-speed auto |
| 5th Wheel Towing | ~22,740 lb | ~31,210 lb |
Cab-to-Axle Measurements — What to Expect
The cab-to-axle (CA) measurement is the single most important spec for choosing your body length. The Ram 3500 chassis cab comes in several CA options:
- Regular Cab, standard CA: ~60 inches — supports an 8-ft (96-in) body
- Regular Cab, long CA: ~84 inches — supports a 10-ft (120-in) body
- Crew Cab, standard CA: ~60 inches — supports an 8-ft body
- Crew Cab, long CA: ~84 inches — supports a 10-ft body
For most Texas tradespeople and fleet operators, the crew cab / 84-inch CA combination is the sweet spot — crew cab comfort with enough CA to run a 9-ft or 10-ft flatbed without overhanging the rear axle.
Best Flatbeds for the Ram 3500 Tradesman Chassis
CM Truck Beds — ER, TM, and RD Flatbeds
CM is one of the most trusted flatbed brands in Texas. The ER (Eliminator) is a clean, affordable workhorse flatbed with full-length toolboxes on both sides. The TM (Truck Model) offers a utilitarian look with drop sides. Available in 8-ft, 9-ft, and 11-ft lengths to match your CA. Powder-coat finish standard.
Norstar Flatbeds — SD and ST Series
Norstar flatbeds are built with heavy-gauge steel and fit excellently on Ram chassis cabs. The SD Series is their most popular flatbed — clean, functional, and available in multiple widths and lengths. Excellent for ranch and ag use on the Tradesman chassis.
Bedrock Flatbeds — Diamond and Granite Series
Bedrock builds premium flatbeds with precision-formed diamond plate and clean welds. Their Diamond Series is a popular choice for contractors who want a professional-looking flatbed that holds up to hard use. Fits the Ram 3500 Tradesman chassis in 8-ft and longer configurations.
Service Bodies and Crane Bodies
- RKI Service Bodies — Manufactured in Houston, TX. Aluminum compartments, locking drawers, ideal for electricians, plumbers, and HVAC techs running a Ram 3500 DRW chassis.
- STI Mechanics Trucks — Heavy-duty mechanics bodies for oilfield and fleet maintenance crews. Best on DRW Tradesman chassis.
SRW or DRW — Which Ram 3500 for Your Body?
- SRW Tradesman: Great for flatbeds up to 10 ft. Easier to drive and park. Best for contractors who don’t max out payload every day.
- DRW Tradesman: Required for heavy service bodies, mechanics trucks, or regularly hauling maximum payload. Extra rear tires add stability and raise your legal payload ceiling.
Why Buy the Tradesman Trim?
The Tradesman is Ram’s base trim — and that’s exactly why it’s popular for commercial chassis cab builds. You’re not paying for leather seats you’ll never use in a work truck. The Tradesman gives you the Cummins diesel, the Aisin transmission, and the robust frame at a lower MSRP than Laramie or Big Horn trim levels. Many fleets spec Tradesman chassis cabs by the dozen for this reason.
Get Your Ram 3500 Tradesman Built in Wharton, TX
Star Truck Equipment is located in Wharton, TX — convenient to Houston, Victoria, and the surrounding region. We install bodies from CM, Norstar, Bedrock, Bradford Built, RKI, and STI.
Call us at (979) 532-1486 to discuss your Ram 3500 Tradesman build. See our full flatbed lineup and service body options.