XL Extendable step decks
The SDE pairs a fixed neck with an extending lower deck for long freight. It is a useful starting point when cargo length drives the trailer choice and a detachable front-loading neck is not required.
Know which build you’re comparing.
Manufacturer reference configuration, reviewed September 18, 2026. Confirm the exact build sheet, load distribution and operating configuration before selecting a trailer. Ratings shown do not establish a legal payload or route approval.
View manufacturer specificationsManufacturer brochure (PDF)| Reference model | XL 110 SDE |
|---|---|
| Overall capacity | 110,000 lb |
| Concentrated capacity | 90,000 lb in 10' closed |
| Gooseneck Length | 10' |
| Main Deck length Range | 38' - 57' 10" |
| Loaded Deck Height | 40" |
| Standard Axles | 3 |
| Standard overall length | 48' |
| Wheel Area | Covered wheels |
Where this family fits
The XL 110 SDE reference model extends from 38 feet to 57 feet 10 inches on the main deck. XL publishes a 40-inch loaded deck height for this model; the 120 and 130 SDE tables list a different, 33-inch deck.
Work through support locations and load distribution as carefully as total length. The reference concentrated-load rating is for the deck closed. A jeep or booster can help distribute weight across axles but does not raise the trailer’s structural capacity.
Extendable step decks
Explore current listings below. Confirm the unit’s location, configuration and timing with our sales team.
Let’s find the right configuration.
There are no matching listings in this family right now. Send us the load and timing you have in mind to discuss availability and order options.
A few things worth clarifying.
Should I choose an extendable step deck or an extendable lowboy?
Start with loaded height and loading method. A step deck offers a fixed-neck layout for long freight. An HDE or MDE lowboy provides a lower well and a detachable neck for front loading. Compare the actual drawings and load charts for the proposed builds.
Is this an in-stock trailer or a configuration to discuss?
The specifications describe the manufacturer’s reference configuration. Matching live listings appear separately on this page. If none are listed, ask Western Truck & Trailer about current availability, specifications and order timing.
Get an XL quote that fits the work.
Have a model in mind or still comparing? Tell us what you haul, the truck you run and when you need it. Our team can work through current availability and configuration options with you.
Send your XL inquiry
A few load details help us recommend the next step.