01 What makes it unique
Ember lists the 2027 E-Series 18RBE at 4,175 lb unloaded (UVW), with a GVWR of 5,690 lb, a cargo carrying capacity of 1,515 lb and a hitch weight of 540 lb. Its UVW plus its cargo capacity comes to exactly its GVWR.
It is 21' 10" long and 11' 3" high with the air conditioner, with 55 gal fresh, 35 gal grey, 35 gal black. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank uses roughly 457 lb of the cargo capacity before anything else is loaded.
Among the 12 E-Series floorplans Ember lists for 2027 with a published weight, it is number 4 by unloaded weight, in a range from 1,740 lb (12RK) to 6,130 lb (26ETS). Every figure in that comparison is Ember’s, for the same model year.
Every number on this page was read on 5 Nov 2026 from Ember’s own floorplan page for the E-Series 18RBE, whose structured data names the model year 2027.
How the 18RBE differs from the other eleven E-Series floorplans. Most distinctive first. How these ranks are worked out.
- Cargo capacity as a share of GVWR, 26.6%: third-largest of twelve, between the 18FBE (26%) and the 12FK (47%).
- Dry weight, 4,175 lb: fourth-lightest of twelve, between the 18FBE (4,130 lb) and the 19ETS (4,495 lb).
- GVWR, 5,690 lb: fourth-lowest of twelve, between the 18FBE (5,580 lb) and the 19ETS (5,995 lb).
- Cargo capacity, 1,515 lb: fourth-smallest of twelve, between the 19ETS (1,500 lb) and the 22ETS (1,620 lb).
- Tongue weight as a share of dry weight, 12.9%: fourth-largest of twelve, between the 25RUD (12.2%) and the 19ETS (13.7%).
- Length, 21 ft 10 in: fourth-shortest of twelve, between the 18FBE (21 ft 4 in) and the 19ETS (23 ft 4 in).
- Tongue weight, 540 lb: fifth-lightest of twelve, between the 21RKE (535 lb) and the 21FBE (580 lb).
- Exterior height, 11 ft 3 in: tallest of twelve, level with the 18FBE and 19ETS; next are the 21FBE, 21RKE and five others (11 ft 2 in).
Next to the 18FBE, the nearest lighter floorplan by dry weight, the 18RBE is 45 lb heavier by dry weight, has a GVWR 110 lb higher, has 65 lb more cargo capacity, has a tongue weight 70 lb heavier and is 6 in longer; the two publish the same exterior height, fresh tank, grey tank and black tank.
Next to the 19ETS, the nearest heavier floorplan by dry weight, the 18RBE is 320 lb lighter by dry weight, has a GVWR 305 lb lower, has 15 lb more cargo capacity, has a tongue weight 75 lb lighter and is 1 ft 6 in shorter; the two publish the same exterior height, fresh tank, grey tank and black tank.
02 Full specifications
Dimensions
- Exterior length
- 21' 10"
- Exterior height
- 11' 3" (with A/C)
- Exterior width
- 96"
- Interior height
- Not published by Ember
Weights
- Dry / unit base weight (UVW)
- 4,175 lb
- GVWR (max loaded)
- 5,690 lb
- Net cargo / payload (CCC)
- 1,515 lb
- Hitch / tongue weight
- 540 lb
Capacities
- Fresh water
- 55 gal
- Grey water
- 35 gal
- Black water
- 35 gal
- Propane
- 40 lb
Running gear
- Hitch type
- Bumper pull
- Tire size
- 15"
Sleeping & layout
- Sleeps
- 2-4
- Awning
- 14'
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
Weight budget
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 (5,690 lb) and the upper loaded tongue estimate (854 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 E-Series floorplan family
Ember lists 12 E-Series floorplans for 2027; this site profiles every one with a published weight, from Ember’s own floorplan pages.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 12RK | 15' 9" | 1-2 | Profiled |
| 12FK | 15' 9" | 2-3 | Profiled |
| 18FBE | 21' 4" | 2-4 | Profiled |
| 18RBE | 21' 10" | 2-4 | Profiled |
| 19ETS | 23' 4" | 5-8 | Profiled |
| 21RKE | 25' 3" | 2-4 | Profiled |
| 21FBE | 25' 11" | 2-4 | Profiled |
| 22MLQ | 27' 1" | 2-4 | Profiled |
| 22ETS | 27' 1" | 5-8 | Profiled |
| 24RLD | 28' 7" | 2-4 | Profiled |
| 25RUD | 30' 1" | 2-4 | Profiled |
| 26ETS | 31' 7" | 5-8 | Profiled |
Ember lists 12 E-Series floorplans. Every 2027 plan with a published weight has a page here; the rest are catalogued with the reason against each.
04 Notes on this floorplan
What Ember does not publish for the 18RBE
Ember’s page prints no axle count and no interior height against this floorplan, so none is given. 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
4,130 lb UVW and 5,580 lb GVWR, against this plan’s 4,175 lb and 5,690 lb.
4,495 lb UVW and 5,995 lb GVWR, against this plan’s 4,175 lb and 5,690 lb.
06 Loading it for a trip
A full 55-gallon fresh tank is about 457 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 30% of the 18RBE’s 1,515 lb cargo capacity, leaving 1,058 lb (265 lb per rated berth). Across 12 E-Series floorplans the water share runs 13% to 31%, and 3 give up more than this one. Nearest on that share: E-Series 22ETS at 28% and E-Series 19ETS at 30%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).
07 Where this floorplan sits
Closest sibling: the E-Series 18FBE, nearest on the published figures. It differs on 5 of the 9 fields both publish (this plan first): length 21 ft 10 in vs 21 ft 4 in; dry weight 4,175 lb vs 4,130 lb; GVWR 5,690 lb vs 5,580 lb; cargo capacity 1,515 lb vs 1,450 lb; hitch weight 540 lb vs 470 lb. They match on sleeps, fresh tank, grey tank and black tank.
| E-Series plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 5,690 | 4 of 12 | 3,450–7,595 |
| Dry weight (lb) | 4,175 | 4 of 12 | 1,740–6,130 |
| Cargo capacity (lb) | 1,515 | 4 of 12 | 1,450–1,815 |
| Hitch weight (lb) | 540 | 5 of 12 | 255–705 |
| Length | 21 ft 10 in | 4 of 12 | 15 ft 9 in–31 ft 7 in |
| Fresh tank (gal) | 55 | 3–12 of 12 | 26–55 |
| Grey tank (gal) | 35 | 1–7 of 10 | 35–70 |
| Sleeps | 4 | 3–9 of 12 | 2–8 |
Either side of it by GVWR: E-Series 18FBE is 110 lb lighter (5,580 lb GVWR); E-Series 19ETS is 305 lb heavier (5,995 lb GVWR).
| Nearest E-Series siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| E-Series 18RBE | 21 ft 10 in | 4 | 4,175 | 5,690 | 1,515 | 540 | 55 |
| E-Series 18FBE | 21 ft 4 in | 4 | 4,130 | 5,580 | 1,450 | 470 | 55 |
| E-Series 21RKE | 25 ft 3 in | 4 | 4,975 | 6,695 | 1,720 | 535 | 55 |
| E-Series 21FBE | 25 ft 11 in | 4 | 5,070 | 6,795 | 1,725 | 580 | 55 |
| E-Series 22MLQ | 27 ft 1 in | 4 | 5,300 | 6,995 | 1,695 | 590 | 55 |
| E-Series 19ETS | 23 ft 4 in | 8 | 4,495 | 5,995 | 1,500 | 615 | 55 |
All 12 E-Series floorplans: E-Series line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 18RBE | 5,690 | 4,175 | 4 | 21 ft 10 in |
| Cascade 17MPHC | 5,690 | 4,879 | — | 26 ft 8 in |
| Puma Camping Edition 20RLCE | 5,688 | 4,188 | — | 24 ft 8 in |
| Surveyor Legend 19MDBLE | 5,698 | 4,100 | — | 23 ft 7 in |
| Jay Feather 18MBH | 5,700 | 4,395 | 4 | 23 ft 0 in |
| Cherokee Wolf Pup Black Label 17JWBL | 5,702 | 4,174 | — | 23 ft 11 in |
| EVO 178BHS | 5,670 | 4,182 | — | 22 ft 11 in |
Against the 18RBE: the Cascade 17MPHC is 5 ft longer; the Puma Camping Edition 20RLCE is 2 lb lighter and 3 ft longer; the Surveyor Legend 19MDBLE is 8 lb heavier and 2 ft longer.
08 Common questions about the 18RBE
How much does the 18RBE weigh?
4,175 lb dry; 5,690 lb GVWR, the most it may weigh loaded.
How much can the 18RBE carry?
1,515 lb, 27% of its GVWR (median across 1,010 travel trailers here: 23%). A full fresh tank uses 457 lb of it.
What is the tongue weight of the 18RBE?
540 lb as published, 13% of the dry weight (median across 1,413 travel trailers here: 12%).
What size tow vehicle does the 18RBE need?
A tow rating of at least 5,690 lb, plus payload for the loaded tongue weight, passengers and cargo.
How many people does the 18RBE sleep?
Its published sleeping capacity is 2–4. 3 of the 12 E-Series floorplans that publish a count sleep more.
What are the tank capacities on the 18RBE?
Fresh 55, grey 35, black 35 gallons. Off hookups, fresh water runs out first.
How long is the 18RBE?
21' 10" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
12 of the 18 fields this catalogue tracks are published for the 18RBE. Not published: interior height, slide count, axle count, refrigerator, air conditioning, tire size (a description is published, a size is not).
Sourcing rules: methodology.
10 Manuals & documents
Sources: emberrv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 4 recall campaigns and 1 owner complaint (model years 2005 on) against the E-Series line (a recall and a complaint are not the same thing).
Too few reports to show a pattern. 1 complaint has been filed on this line — not enough to say what fails most often. It covers unknown or other.
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 E-Series line page.