
SmithCo SX6 6 axle side dumps.
The SX6 reference combines a 40-foot tub with six trailer axles. Before comparing payload, establish the tractor, axle spacing and routes that will support the complete combination.

SX6 · 6 axle: current listings
These listings match this SmithCo family. Open a listing for its location and equipment; confirm pricing, condition and timing with sales.
- available units
- 0
- incoming units
- 8
- listings
- 3
The matching units are incoming. Ask sales about arrival timing.
New
SmithCo SX6-53-40 Side Dump
Call for availability
Call for price
New
SmithCo SX6-53-40 Side Dump
Call for availability
$142,900
New
SmithCo SX6-53-40 Side Dump
Call for availability
$142,900
Where this trailer fits.
Build the proposal around the whole vehicle
SmithCo’s published SX6 uses a 53-foot frame, a 40-foot tub, three fixed axles and three steerable lift axles. Review the actual tare weights and weight distribution with the tractor before estimating usable payload.
Include working clearances and hydraulics
Confirm room for turning, loading and discharge as well as the tractor’s hydraulic supply. A reference tub capacity is a volume measurement; it does not establish a road-legal load or licensing requirement.
Questions before you choose.
Is the SX6 automatically a 37.4-ton payload trailer?
No. Manufacturer payload examples depend on the complete vehicle configuration and operating conditions. Confirm actual weights, axle spacing, route requirements and the quoted build before setting the load.
How do I check SX6 availability?
Matching live listings appear on this page, with available and incoming quantities shown separately. If none appear, send your required configuration and target date so sales can review sourcing options.
Bring us the application.
- The material and load
- Bring the material, density, target load and loading equipment. Tub volume and usable payload answer different questions.
- The tractor and route
- Include the tractor wheelbase, axle arrangement and routes. Review the complete combination and required weight distribution before choosing trailer axles.
- The working configuration
- Compare fixed, lift and steerable axles, tires, tarp and tractor hydraulics. Confirm dimensions and equipment on the actual build sheet.
Tell us what you need
Your inquiry goes to Western Truck & Trailer’s sales team.
