01 What makes it unique
Aliner lists the 2026 Expedition Rear Sofa/Mattress at 1,985 lb dry, a GVWR of 3,500 lb and a tongue weight of 240 lb. Aliner prints no cargo carrying capacity for it, so none is given here; the federal label inside the trailer carries one.
It is 18' long and 66" high folded for travel. Aliner prints its tanks as 11 gal fresh.
Among the 13 models Aliner lists for 2026 with a published dry weight, it is number 9 from the lightest, in a range from 1,190 lb (Scout Lite) to 2,600 lb (Aliner Amp). Every figure in that comparison is Aliner’s, for the same model year.
Every number on this page was read on 5 Nov 2026 from Aliner’s 2026 Product Catalog, the maker’s own dated document for model year 2026.
How the Expedition Rear Sofa/Mattress differs from the other twelve Aliner floorplans. Most distinctive first. How these ranks are worked out.
- Tongue weight as a share of dry weight, 12.1%: second-largest of thirteen, between the Lite (10.9%) and the Dinette (13.5%).
- Dry weight, 1,985 lb: fifth-heaviest of thirteen, between the Evolution 12 (1,965 lb) and the LG (2,390 lb).
- Tongue weight, 240 lb: heaviest of thirteen, level with the Evolution 15 Twin Bed and LG; next is the Evolution 12 (210 lb).
- GVWR, 3,500 lb: highest of thirteen, level with the 15, Amp and two others; next are the Classic Rear Sofa/Mattress, Classic Twin Bed and six others (3,000 lb).
- Length, 18 ft: longest of thirteen, level with the 15, Amp and two others; next are the Classic Rear Sofa/Mattress, Classic Twin Bed and four others (15 ft).
- Interior height, 8 ft 3 in: tallest of thirteen, level with the 15, Amp and two others; next are the Classic Rear Sofa/Mattress, Classic Twin Bed and four others (8 ft 1 in).
Next to the Evolution 12, the nearest lighter floorplan by dry weight, the Expedition Rear Sofa/Mattress is 20 lb heavier by dry weight, has a GVWR 500 lb higher, has a tongue weight 30 lb heavier, is 3 ft longer and has 2 in more interior height; the two publish the same fresh tank.
Next to the LG, the nearest heavier floorplan by dry weight, the Expedition Rear Sofa/Mattress is 405 lb lighter by dry weight and has a fresh tank 24 gal smaller; the two publish the same GVWR, tongue weight, length and interior height.
02 Full specifications
Dimensions
- Exterior length
- 18'
- Exterior height
- Not published by Aliner
- Exterior width
- 84"
- Interior height
- 99"
- Closed (travel) height
- 66"
Weights
- Dry / unit base weight (UVW)
- 1,985 lb
- GVWR (max loaded)
- 3,500 lb
- Net cargo / payload (CCC)
- Not published by Aliner
- Hitch / tongue weight
- 240 lb
Capacities
- Fresh water
- 11 gal
- Grey water
- Not published by Aliner
- Black water
- Not published by Aliner
Running gear
- Hitch type
- Bumper pull
- Tire size
- Not published by Aliner
Sleeping & layout
- Sleeps
- Not published by Aliner
How these published figures sit against the rest of the catalogue: travel trailer tongue weight by size; fresh, grey and black tank sizes; camper trailer size chart.
Towing it
Check your vehicle. Enter the ratings from your owner’s manual and the door-pillar placard.
Compares your figures with this page’s published GVWR (3,500 lb) and the upper loaded tongue estimate (525 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern.
Loaded range: 10–15% of GVWR on the tongue, a rule of thumb, not a measurement of this unit. No truck ratings or hitch classes (why; NHTSA, DOT HS 809 433).
03 The Aliner floorplan family
Aliner lists 13 models for 2026; this site profiles every one with a published dry weight, from Aliner’s own 2026 Product Catalog.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Scout Lite | 13' | — | Profiled |
| Ranger 10 Dual Bed/Rear Dinette | 13' | — | Profiled |
| Scout | 15' | — | Profiled |
| Ranger 12 | 15' | — | Profiled |
| Classic Rear Sofa/Mattress | 15' | — | Profiled |
| Classic Twin Bed | 15' | — | Profiled |
| LXE | 15' | — | Profiled |
| Evolution 12 | 15' | — | Profiled |
| Expedition Rear Sofa/Mattress | 18' | — | Profiled |
| Evolution LG | 18' | — | Profiled |
| Evolution 15 | 18' | — | Profiled |
| Evolution 15 Twin Bed | 18' | — | Profiled |
| Aliner Amp | 18' | — | Profiled |
Aliner lists 13 models for 2026. Every one with a published dry weight has a page here.
04 Notes on this floorplan
What Aliner does not publish for the Expedition Rear Sofa/Mattress
Aliner prints no cargo carrying capacity, tire size, grey-tank, black-tank, sleeping capacity for this model, so none is given. Nothing is filled from a sibling model, a different model year or a dealer listing.
Read the label on the trailer
Federal rules put a load-carrying label inside every RV trailer: its unloaded weight with full propane, its cargo carrying capacity and its GVWR (49 CFR 571.110 and 571.120). Those figures come from the trailer itself and govern the towing decision.
05 How it compares
1,965 lb dry and 3,000 lb GVWR, against this model’s 1,985 lb and 3,500 lb.
2,390 lb dry and 3,500 lb GVWR, against this model’s 1,985 lb and 3,500 lb.
07 Where this floorplan sits
Closest sibling: the Aliner Evolution 12, nearest on the published figures. It differs on 4 of the 5 fields both publish (this plan first): length 18 ft 0 in vs 15 ft 0 in; dry weight 1,985 lb vs 1,965 lb; GVWR 3,500 lb vs 3,000 lb; hitch weight 240 lb vs 210 lb. They match on fresh tank.
| Aliner plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 3,500 | 9–13 of 13 | 3,000–3,500 |
| Dry weight (lb) | 1,985 | 9 of 13 | 1,190–2,600 |
| Hitch weight (lb) | 240 | 11–13 of 13 | 130–240 |
| Length | 18 ft 0 in | 9–13 of 13 | 13 ft 0 in–18 ft 0 in |
| Fresh tank (gal) | 11 | 1–7 of 11 | 11–35 |
Either side of it by GVWR: Aliner Evolution LG matches it at 3,500 lb GVWR.
| Nearest Aliner siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Aliner Expedition Rear Sofa/Mattress | 18 ft 0 in | — | 1,985 | 3,500 | — | 240 | 11 |
| Aliner Evolution 12 | 15 ft 0 in | — | 1,965 | 3,000 | — | 210 | 11 |
| Aliner LXE | 15 ft 0 in | — | 1,930 | 3,000 | — | 180 | 11 |
| Aliner Classic Twin Bed | 15 ft 0 in | — | 1,810 | 3,000 | — | 160 | 11 |
| Aliner Classic Rear Sofa/Mattress | 15 ft 0 in | — | 1,725 | 3,000 | — | 160 | 11 |
| Aliner Evolution LG | 18 ft 0 in | — | 2,390 | 3,500 | — | 240 | 35 |
All 13 Aliner floorplans: Aliner line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry or base (lb) | Sleeps | Length |
|---|---|---|---|---|
| Expedition Rear Sofa/Mattress | 3,500 | 1,985 | — | 18 ft 0 in |
| Bambi 16RB | 3,500 | 3,150 | 4 | 16 ft 3 in |
| Basecamp 16X | 3,500 | 2,700 | 2 | 16 ft 2 in |
| Colt 13RD | 3,500 | 2,550 | 4 | 16 ft 1 in |
| E-Series 12FK | 3,500 | 1,855 | 3 | 15 ft 9 in |
| Jay Feather 15TBSL | 3,500 | 2,515 | 2 | 17 ft 6 in |
| Jay Flight 130BH | 3,500 | 2,460 | 4 | 16 ft 1 in |
Against the Expedition Rear Sofa/Mattress: the Bambi 16RB is 2 ft shorter; the Basecamp 16X is 2 ft shorter; the Colt 13RD is 2 ft shorter.
08 Common questions about the Expedition Rear Sofa/Mattress
How much does the Expedition Rear Sofa/Mattress weigh?
1,985 lb dry; 3,500 lb GVWR, the most it may weigh loaded.
What is the tongue weight of the Expedition Rear Sofa/Mattress?
240 lb as published, 12% of the dry weight (median across 1,413 travel trailers here: 12%).
What size tow vehicle does the Expedition Rear Sofa/Mattress need?
A tow rating of at least 3,500 lb, plus payload for the loaded tongue weight, passengers and cargo.
How long is the Expedition Rear Sofa/Mattress?
18' overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
7 of the 18 fields this catalogue tracks are published for the Expedition Rear Sofa/Mattress. Not published: cargo capacity (CCC), exterior height, grey tank, black tank, sleeps, slide count, axle count, tire specification, awning, refrigerator, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: aliner.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 3 recall campaigns and 5 owner complaints (model years 2005 on) against the Aliner line (a recall and a complaint are not the same thing).
Too few reports to show a pattern. 5 complaints have been filed on this line — not enough to say what fails most often. They cover structure and suspension.
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Aliner line page.