2026 Forest River IBEX16MKS

The IBEX 16MKS has 912 lbs of cargo capacity between 4,013 lbs dry and its 4,925 lbs GVWR, 19% of that rating; filling its 40-gallon fresh tank at 8.3 lb a gallon uses 332 lbs of it (how to read trailer weights).

Tongue weight is 525 lbs, 13% of the dry weight as published; it rises as the trailer is loaded and counts against the tow vehicle’s tongue-weight and payload limits (tongue weight by size).

Off hookups: 70 gallons of grey and black capacity against 40 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the IBEX roster this is the 2nd of 16 floorplans by dry weight, in a line that runs from 3,778 lbs to 6,733 lbs. It sits in the lighter third of the line.

Plan the tow on loaded weight, not the 4,013 lbs dry figure: half the published cargo capacity brings this plan to about 4,469 lbs, and the published GVWR of 4,925 lbs is the limit (how to read trailer weights).

Forest River’s line listing and this floorplan’s own factory page agree on all 4 shared figures. Dry weight plus cargo capacity equals the published GVWR exactly. A missing row means Forest River does not publish that figure (how figures are verified).

Forest River's own description of this floorplan reads: “The 16MKS is a rear-bath travel trailer that blends comfort, space, and versatility in an easy-to-tow design. A slide-out sofa opens the living area for relaxing or entertaining, while the front queen bed offers a private, comfortable retreat with ample storage. The spacious rear bath adds rare luxury, and the well-equipped kitchen—inside and out—makes mealtime effortless. Lightweight yet full-featured, the 16MKS…” 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.

How the 16MKS differs from the other fifteen IBEX floorplans. Most distinctive first. How these ranks are worked out.

• Dry weight, 4,013 lb: second-lightest of sixteen, between the 16MRJ (3,778 lb) and the 16MKD (4,023 lb).
• GVWR, 4,925 lb: second-lowest of sixteen, between the 19QRB (4,915 lb) and the 16MKD (5,523 lb).
• Cargo capacity, 912 lb: second-smallest of sixteen, between the 19QRB (747 lb) and the 19MSB (1,275 lb).
• Length, 20 ft 6 in: second-shortest of sixteen, between the 16MRJ (19 ft 10 in) and the 16MBJ and 16MKD (21 ft 8 in).
• Cargo capacity as a share of GVWR, 18.5%: third-smallest of sixteen, between the 26BRE (18.2%) and the 25MLB (18.8%).
• Tongue weight, 525 lb: fourth-lightest of sixteen, between the 19QRB (515 lb) and the 20MKB (550 lb).
• Tongue weight as a share of dry weight, 13.1%: seventh-largest of sixteen, between the 19MBH (13%) and the 20FKDS (14.1%).
• Grey tank, 40 gal: shared with the 20MDS, 20MKB and two others; of sixteen, eight smaller and three larger, nearest the 16MBJ, 16MKD and six others (30 gal) and the 20FKDS, 25MLB and 26BRE (60 gal).

Next to the 16MRJ, the nearest lighter floorplan by dry weight, the 16MKS is 235 lb heavier by dry weight, has a GVWR 655 lb lower, has 890 lb less cargo capacity, has a tongue weight 45 lb heavier, is 8 in longer, stands 5 in taller, has a fresh tank 10 gal larger and has a grey tank 10 gal larger; the two publish the same black tank.

Next to the 16MKD, the nearest heavier floorplan by dry weight, the 16MKS is 10 lb lighter by dry weight, has a GVWR 598 lb lower, has 588 lb less cargo capacity, has a tongue weight 45 lb lighter, is 1 ft 2 in shorter, stands 5 in taller, has a fresh tank 10 gal larger and has a grey tank 10 gal larger; the two publish the same black tank.

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. 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 40-gallon fresh tank is about 332 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 36% of the 16MKS’s 912 lb cargo capacity, leaving 580 lb. Across 16 IBEX floorplans the water share runs 14% to 36%, and this plan’s is the highest. Nearest on that share: IBEX 19QRB at 33%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).