2026 Forest River IBEX16MRJ

The IBEX 16MRJ leaves Forest River's factory at 3,778 lbs dry, with a published GVWR of 5,580 lbs and 1,802 lbs of cargo capacity between the two. Cargo capacity is 32% of the loaded rating, and Forest River's own definition is worth reading before you plan against it: cargo capacity is what remains for fresh water, gear, food, batteries and every dealer-installed accessory. Fresh water alone is 8.3 lb per gallon, so filling this trailer's 30-gallon fresh tank spends 249 lbs of that 1,802 lbs before anything else is loaded.

Dry tongue weight is 480 lbs, or 13% of the dry weight. Ten to fifteen percent is the conventional band for a bumper-pull trailer, and this plan sits inside it as published. Tongue weight is not fixed: it moves with how the trailer is loaded, and weight added ahead of the axles raises it. A weight-distribution hitch is the normal fitment at this tongue load, and the tow vehicle's tongue-weight limit is a separate number from its trailer-weight limit.

Tank capacities are 30 gallons fresh, 30 grey and 30 black, 60 gallons of waste capacity against 30 gallons of supply. The ratio is what governs how long the trailer can sit off hookups: waste capacity exceeds fresh, so the fresh tank is the binding constraint and refilling extends the stay. Forest River publishes these three figures per floorplan, and they are the factory's numbers rather than a segment average.

Against the rest of the IBEX roster this is the 3rd of 20 floorplans by dry weight, in a line that runs from 2,094 lbs to 9,975 lbs. It sits in the lighter third of the line. Comparing floorplans inside one line is more reliable than comparing across brands, because every figure here comes from the same factory channel on the same day.

A useful way to read the pair of weights is to stop planning against the dry figure. Nobody tows a trailer at 3,778 lbs: that is the weight before water, batteries, propane, bedding, food, tools and anything the dealer bolted on. Load half the published cargo capacity, which is modest for a family trip, and this plan is already near 4,679 lbs on the road. Compare that number against the tow vehicle, not the dry weight, and leave margin on top of it - the published GVWR of 5,580 lbs is a limit rather than a target.

Every number above was captured twice from Forest River and checked against itself before it was published. The line listing and the individual floorplan page are two separate factory renderings of the same trailer, and this plan's 4 shared figures agree exactly on both. Dry weight plus cargo capacity also equals the published GVWR exactly, which is the arithmetic check this site runs on every profiled floorplan. Where a figure is missing from this page it is because Forest River does not publish it in this channel, not because it was hard to find - and the row says so rather than being quietly dropped.

Forest River's own description of this floorplan reads: “The 16MRJ is a rugged yet refined travel trailer that delivers full-feature comfort in a compact, adventure-ready design. A front queen bed offers a restful retreat, while the central kitchen and lounge area make meal prep and relaxation effortless. Outside, a 12' awning and easy-access storage keep you connected to the outdoors. Lightweight, durable, and built for exploration, the 16MRJ couples the perfect…” That is the factory's marketing copy rather than a specification, and nothing in it is treated as a verified field on this page - layout descriptions, sleeping arrangements and feature claims in factory copy are not carried into the spec table unless the factory also publishes them as specifications.

IBEX is Forest River's lightweight four-season travel trailer, built at the company's Outdoors RV-adjacent end of the travel-trailer range rather than in the value tier. The roster runs from a 16-foot single-axle at under 4,100 lb dry to a tandem-axle 26-footer, so the whole line stays inside half-ton and mid-size-SUV territory on paper. Forest River publishes a full weight and capacity block for every floorplan, which is why this line could be catalogued completely rather than partially.

A full 30-gallon fresh tank is about 250 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 14% of the 16MRJ’s 1,802 lb cargo capacity, leaving 1,552 lb. Across 16 IBEX floorplans the water share runs 14% to 37%, and this plan’s is the lowest. Nearest on that share: IBEX 16MKD at 17%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).

Closest sibling: the IBEX 16MBJ, nearest on the published figures. It differs on 5 of the 8 fields both publish (this plan first): length 19 ft 10 in vs 21 ft 8 in; dry weight 3,778 lb vs 4,088 lb; GVWR 5,580 lb vs 5,585 lb; cargo capacity 1,802 lb vs 1,497 lb; dry hitch weight 480 lb vs 485 lb. They match on fresh tank, grey tank and black tank.

Either side of it by GVWR: IBEX 16MKD is 57 lb lighter (5,523 lb GVWR); IBEX 16MBJ is 5 lb heavier (5,585 lb GVWR).

All 16 IBEX floorplans: IBEX line hub.

Against the 16MRJ: the Cherokee Wolf Pup Black Label 16CMBL is 2 lb lighter and 4 ft longer; the Cascade 18PBC is 5 lb lighter and 4 ft longer; the Campsite Reserve 18LM is 15 lb heavier and 4 ft longer.

11 of the 18 fields this catalogue tracks are published for the 16MRJ. Not published: interior height, sleeps, slide count, axle count, tire specification, refrigerator, air conditioning.

Sourcing rules: methodology.