01 What makes it unique
Grand Design publishes an unloaded vehicle weight (UVW) of 3,547 lb and a GVWR of 4,795 lb for the 2027 Imagine AIM 15RBA, with a hitch weight of 392 lb. It does not publish a cargo carrying capacity on the floorplan page, so none is shown here, and none is worked out by subtracting one published figure from the other. The trailer’s own federal weight label, inside the door, carries its cargo capacity as built.
It is 19' 8" long, 10' 2" high and 8' wide, with 37 gal fresh, 45 gal grey and 37 gal black tanks as Grand Design lists them. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank adds roughly 307 lb before anything else is loaded.
Among the 6 Imagine AIM floorplans profiled from Grand Design’s 2027 pages, it is number 1 of 6 by unloaded weight, in a range from 3,547 lb to 5,361 lb. Every figure in that comparison comes from the same Grand Design page type for the same model year.
Every number on this page was read on 19 Oct 2026 from Grand Design’s own floorplan page for the Imagine AIM 15RBA, whose structured data names the model year 2027.
How the 15RBA differs from the other five Imagine AIM floorplans. Most distinctive first. Each rank counts only the siblings that publish that field, and a figure most of them share is left out.
- Dry weight, 3,547 lb: lightest of six; next is the 16MLA (3,813 lb).
- Tongue weight, 392 lb: lightest of six; next is the 16MLA (432 lb).
- Tongue weight as a share of dry weight, 11.1%: second-largest of six, between the 19MLA (11%) and the 16MLA (11.3%).
- GVWR, 4,795 lb: lowest of six, level with the 16MLA; next are the 17MKA, 19MLA and two others (6,395 lb).
- Length, 19 ft 8 in: shortest of six, level with the 16MLA; next is the 17MKA (21 ft 8 in).
- Exterior height, 10 ft 2 in: lowest of six, level with the 16MLA; next are the 19MLA and 20BHA (10 ft 5 in).
- Sleeping capacity, 3: shared with the 16MLA; of six, two smaller and two larger, nearest the 17MKA and 19MLA (2) and the 20BHA and 21MBA (5).
Next to the 16MLA, the nearest heavier floorplan by dry weight, the 15RBA is 266 lb lighter by dry weight and has a tongue weight 40 lb lighter; the two publish the same GVWR, length, exterior height, fresh tank, grey tank, black tank and sleeping capacity.
02 Full specifications
Dimensions
- Exterior length
- 19' 8"
- Exterior height
- 10' 2"
- Exterior width
- 8'
Weights
- Dry / unit base weight (UVW)
- 3,547 lb
- GVWR (max loaded)
- 4,795 lb
- Net cargo / payload (CCC)
- Not published by Grand Design
- Hitch / tongue weight
- 392 lb
Capacities
- Fresh water
- 37 gal
- Grey water
- 45 gal
- Black water
- 37 gal
Running gear
- Hitch type
- Bumper pull
- Tire size
- ST225/75R15 LRE
- Axles
- 1
Sleeping & layout
- Sleeps
- 3
- Refrigerator
- 4.30 cu. ft.
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.
Drawn to scale
Size, with end view
Holding tanks
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
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 (4,795 lb) and the upper loaded tongue estimate (719 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 Imagine AIM floorplan family
Grand Design lists 6 Imagine AIM floorplans for 2027. 6 without an existing page here are profiled from Grand Design’s own floorplan pages, from 3,547 lb to 5,361 lb unloaded; the others link to their existing pages. Grand Design publishes UVW, GVWR and hitch weight for these trailers, and no cargo carrying capacity.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 15RBA | 19' 8" | 3 | Profiled |
| 16MLA | 19' 8" | 3 | Profiled |
| 19MLA | 22' | 2 | Profiled |
| 20BHA | 23' 10" | 5 | Profiled |
| 17MKA | 21' 8" | 2 | Profiled |
| 21MBA | 24' 11" | 5 | Profiled |
Grand Design lists 6 Imagine AIM floorplans for 2027. 6 are profiled here; the rest are catalogued with the reason against each.
04 Notes on this floorplan
What Grand Design does not publish for the Imagine AIM
No cargo carrying capacity appears on Grand Design’s floorplan pages for this series, so that row reads as not published. Nothing is filled from a sibling floorplan, 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
3,813 lb UVW and 4,795 lb GVWR, against this plan’s 3,547 lb and 4,795 lb.
07 Where this floorplan sits
Closest sibling: the Imagine AIM 16MLA, nearest on the published figures. It differs on 2 of the 8 fields both publish (this plan first): dry weight 3,547 lb vs 3,813 lb; hitch weight 392 lb vs 432 lb. They match on length, sleeps, GVWR, fresh tank, grey tank and black tank.
| Imagine AIM plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 4,795 | 1–2 of 6 | 4,795–6,395 |
| Dry weight (lb) | 3,547 | 1 of 6 | 3,547–5,361 |
| Hitch weight (lb) | 392 | 1 of 6 | 392–560 |
| Length | 19 ft 8 in | 1–2 of 6 | 19 ft 8 in–24 ft 11 in |
| Sleeps | 3 | 3–4 of 6 | 2–5 |
Either side of it by GVWR: Imagine AIM 16MLA matches it at 4,795 lb GVWR.
| Nearest Imagine AIM siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Imagine AIM 15RBA | 19 ft 8 in | 3 | 3,547 | 4,795 | — | 392 | 37 |
| Imagine AIM 16MLA | 19 ft 8 in | 3 | 3,813 | 4,795 | — | 432 | 37 |
| Imagine AIM 19MLA | 22 ft 0 in | 2 | 4,361 | 6,395 | — | 478 | 37 |
| Imagine AIM 20BHA | 23 ft 10 in | 5 | 4,538 | 6,395 | — | 468 | 37 |
| Imagine AIM 17MKA | 21 ft 8 in | 2 | 4,945 | 6,395 | — | 525 | 37 |
| Imagine AIM 21MBA | 24 ft 11 in | 5 | 5,361 | 6,395 | — | 560 | 37 |
All 6 Imagine AIM floorplans: Imagine AIM line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 15RBA | 4,795 | 3,547 | 3 | 19 ft 8 in |
| Colt 17DBS | 4,800 | 3,695 | — | 23 ft 7 in |
| Jay Flight 178DBS | 4,800 | 3,730 | 8 | 23 ft 7 in |
| Westbrook 16CC | 4,815 | 3,149 | — | 20 ft 4 in |
| Forest River r·pod RP-190 | 4,770 | 3,049 | 4 | 20 ft 4 in |
| Wildcat 160BATH | 4,759 | 3,489 | — | 22 ft 7 in |
| Jay Flight SLX 160LK | 4,750 | 3,395 | 4 | 21 ft 7 in |
Against the 15RBA: the Colt 17DBS is 5 lb heavier and 4 ft longer; the Jay Flight 178DBS is 5 lb heavier and 4 ft longer and sleeps 5 more; the Westbrook 16CC is 20 lb heavier.
08 Common questions about the 15RBA
How much does the 15RBA weigh?
3,547 lb dry; 4,795 lb GVWR, the most it may weigh loaded.
What is the tongue weight of the 15RBA?
392 lb as published, 11% of the dry weight (median across 1,116 travel trailers here: 12%).
What size tow vehicle does the 15RBA need?
A tow rating of at least 4,795 lb, plus payload for the loaded tongue weight, passengers and cargo.
How many people does the 15RBA sleep?
It is rated to sleep 3. 2 of the 6 Imagine AIM floorplans that publish a count sleep more.
What are the tank capacities on the 15RBA?
Fresh 37, grey 45, black 37 gallons. Off hookups, fresh water runs out first.
How long is the 15RBA?
19' 8" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
13 of the 18 fields this catalogue tracks are published for the 15RBA. Not published: cargo capacity (CCC), interior height, slide count, awning, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: granddesignrv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 15 recall campaigns and 65 owner complaints against the Imagine line. They are counted separately: a recall is a confirmed defect with a remedy, a complaint one owner’s unverified account.
What to look at on a used one. Across the 65 complaints filed on this line the most-reported components are tires (20%), suspension (18%) and structure (17%).
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 Imagine line page.