01 What makes it unique
Forest River lists the 2026 IBEX 20MRK at 5,113 lb dry, a GVWR of 6,613 lb, a net carrying capacity of 1,500 lb and a tongue weight of 735 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
It is 24' 3" long and 11' 3" high. Forest River prints its tanks as 40 gal fresh, 40 gal grey, 30 gal black.
Every number on this page was read on 7 Nov 2026 from Forest River’s own 2026 IBEX floorplan page for the IBEX 20MRK, whose heading names the model year 2026.
How the 20MRK differs from the other seventeen IBEX floorplans. Most distinctive first. How these ranks are worked out.
- Tongue weight as a share of dry weight, 14.4%: fifth-largest of eighteen, between the 16MKD (14.2%) and the 23MBH (14.7%).
- Dry weight, 5,113 lb: sixth-heaviest of eighteen, between the 23MBH (5,108 lb) and the 20FKDS (5,678 lb).
- GVWR, 6,613 lb: sixth-highest of eighteen, between the 23MBH (6,600 lb) and the 20FKDS (7,178 lb).
- Tongue weight, 735 lb: sixth-heaviest of eighteen, between the 19MSB (710 lb) and the 23MBH (750 lb).
- Cargo capacity as a share of GVWR, 22.7%: ninth-largest of eighteen, between the 23MBH (22.6%) and the 20MDS (23.2%).
- Length, 24 ft 3 in: shared with the 20MDS; of eighteen, six shorter and ten longer, nearest the 19QRB (24 ft 2 in) and the 19MBH and 19MSB (24 ft 8 in).
- Grey tank, 40 gal: shared with the 16MKS, 20MDS and three others; of eighteen, nine smaller and three larger, nearest the 16MBJ, 16MKD and seven others (30 gal) and the 20FKDS, 25MLB and 26BRE (60 gal).
Next to the 23MBH, the nearest lighter floorplan by dry weight, the 20MRK is 5 lb heavier by dry weight, has a GVWR 13 lb higher, has 8 lb more cargo capacity, has a tongue weight 15 lb lighter and is 1 ft 11 in shorter; the two publish the same exterior height, fresh tank, grey tank and black tank.
Next to the 20FKDS, the nearest heavier floorplan by dry weight, the 20MRK is 565 lb lighter by dry weight, has a GVWR 565 lb lower, has a tongue weight 65 lb lighter, is 3 ft 4 in shorter and has a grey tank 20 gal smaller; the two publish the same cargo capacity, exterior height, fresh tank and black tank.
02 Full specifications
Dimensions
- Exterior length
- 24' 3"
- Exterior height
- 11' 3"
- Exterior width
- 96"
- Interior height
- Not published by Forest River
Weights
- Dry / unit base weight (UVW)
- 5,113 lb
- GVWR (max loaded)
- 6,613 lb
- Net cargo / payload (CCC)
- 1,500 lb
- Hitch / tongue weight
- 735 lb
Capacities
- Fresh water
- 40 gal
- Grey water
- 40 gal
- Black water
- 30 gal
Running gear
- Hitch type
- Bumper pull
- Tire size
- Not published by Forest River
Sleeping & layout
- Sleeps
- Not published by Forest River
- Availability (as printed)
- Forest River files this floorplan “DSO” (Dealer Stock Only): sold from dealer inventory, not orderable from the factory
- Model year (as printed)
- page title "2026 Ibex 20MRK - DSO Floorplan - Forest River RV"
- Weight basis (as printed)
- UVW footnote: "*Estimated Average based on standard build optional equipment."
- Maker status (as printed)
- title suffix "- DSO"
- 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 (6,613 lb) and the upper loaded tongue estimate (992 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). The range starts at the published figure, because loaded is never lighter than that.
03 The IBEX floorplan family
The IBEX floorplans below were added from Forest River’s 2026 IBEX floorplan page; every IBEX floorplan on this site, every model year, is listed on the IBEX hub.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| IBEX 16RKB | 14' 11" | — | Profiled |
| IBEX 20MRK | 24' 3" | — | Profiled |
The IBEX floorplans below were added from Forest River’s 2026 IBEX floorplan page; every IBEX floorplan on this site, every model year, is listed on the IBEX hub.
04 Notes on this floorplan
What Forest River does not publish for the IBEX 20MRK
Forest River prints no tire size, interior height, 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
3,024 lb dry and 4,524 lb GVWR, against this model’s 5,113 lb and 6,613 lb.
06 Loading it for a trip
A full 40-gallon fresh tank is about 332 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 22% of the IBEX 20MRK’s 1,500 lb cargo capacity, leaving 1,168 lb. Across 18 IBEX floorplans the water share runs 14% to 36%, and 3 give up more than this one. Nearest on that share: IBEX 20FKDS at 22% and IBEX 23MBH at 22%. 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 IBEX 23MBH, nearest on the published figures. It differs on 5 of the 8 fields both publish (this plan first): length 24 ft 3 in vs 26 ft 2 in; dry weight 5,113 lb vs 5,108 lb; GVWR 6,613 lb vs 6,600 lb; cargo capacity 1,500 lb vs 1,492 lb; hitch weight 735 lb vs 750 lb. They match on fresh tank, grey tank and black tank.
| IBEX plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 6,613 | 13 of 18 | 4,524–8,233 |
| Dry weight (lb) | 5,113 | 13 of 18 | 3,024–6,733 |
| Cargo capacity (lb) | 1,500 | 6–17 of 18 | 747–1,802 |
| Hitch weight (lb) | 735 | 13 of 18 | 335–1,030 |
| Length | 24 ft 3 in | 7–8 of 18 | 14 ft 11 in–32 ft 11 in |
| Fresh tank (gal) | 40 | 9–18 of 18 | 30–40 |
| Grey tank (gal) | 40 | 10–15 of 18 | 30–60 |
Either side of it by GVWR: IBEX 23MBH is 13 lb lighter (6,600 lb GVWR); IBEX 20FKDS is 565 lb heavier (7,178 lb GVWR).
| Nearest IBEX siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| IBEX 20MRK | 24 ft 3 in | — | 5,113 | 6,613 | 1,500 | 735 | 40 |
| IBEX 23MBH | 26 ft 2 in | — | 5,108 | 6,600 | 1,492 | 750 | 40 |
| IBEX 20MDS | 24 ft 3 in | — | 4,963 | 6,463 | 1,500 | 630 | 40 |
| IBEX 20MKB | 25 ft 0 in | — | 4,913 | 6,413 | 1,500 | 550 | 40 |
| IBEX 25RLSS | 29 ft 0 in | — | 5,743 | 7,243 | 1,500 | 850 | 40 |
| IBEX 20FKDS | 27 ft 7 in | — | 5,678 | 7,178 | 1,500 | 800 | 40 |
All 18 IBEX floorplans: IBEX line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| IBEX 20MRK | 6,613 | 5,113 | — | 24 ft 3 in |
| Super Lite 225CK | 6,600 | 5,120 | 6 | 27 ft 4 in |
| Coachmen Catalina 211BH | 6,647 | 4,647 | 6 | 25 ft 11 in |
| Aurora Light 21BH | 6,575 | 4,575 | — | 25 ft 11 in |
| Puma Camping Edition 23BHCE | 6,653 | 5,153 | — | 29 ft 8 in |
| E-Series 21RKE | 6,695 | 4,975 | 4 | 25 ft 3 in |
| Open Range Travel Trailer 22MLS | 6,700 | 5,265 | 4 | 27 ft 5 in |
Against the IBEX 20MRK: the Super Lite 225CK is 13 lb lighter and 3 ft longer; the Coachmen Catalina 211BH is 34 lb heavier and 2 ft longer; the Aurora Light 21BH is 38 lb lighter and 2 ft longer.
08 Common questions about the IBEX 20MRK
How much does the IBEX 20MRK weigh?
5,113 lb dry; 6,613 lb GVWR, the most it may weigh loaded.
How much can the IBEX 20MRK carry?
1,500 lb, 23% of its GVWR (median across 1,416 travel trailers here: 23%). A full fresh tank uses 332 lb of it.
What is the tongue weight of the IBEX 20MRK?
735 lb as published, 14% of the dry weight (median across 2,002 travel trailers here: 12%).
What size tow vehicle does the IBEX 20MRK need?
A tow rating of at least 6,613 lb, plus payload for the loaded tongue weight, passengers and cargo.
What are the tank capacities on the IBEX 20MRK?
Fresh 40, grey 40, black 30 gallons. Off hookups, fresh water runs out first.
How long is the IBEX 20MRK?
24' 3" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
11 of the 18 fields this catalogue tracks are published for the IBEX 20MRK. Not published: interior height, sleeps, slide count, axle count, tire specification, refrigerator, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: forestriverinc.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 8 recall campaigns and 3 owner complaints (model years 2005 on) against the IBEX line (a recall and a complaint are not the same thing).
Too few reports to show a pattern. 3 complaints have been filed on this line — not enough to say what fails most often. They cover 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 IBEX line page.