2026 Forest River IBEX19MSB

The IBEX 19MSB has 1,275 lbs of cargo capacity between 4,809 lbs dry and its 6,084 lbs GVWR, 21% of that rating; filling its 30-gallon fresh tank at 8.3 lb a gallon uses 249 lbs of it (how to read trailer weights).

Tongue weight is 710 lbs, 15% 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: 60 gallons of grey and black capacity against 30 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the IBEX roster this is the 7th of 16 floorplans by dry weight, in a line that runs from 3,778 lbs to 6,733 lbs. It sits in the middle of the line by weight.

Plan the tow on loaded weight, not the 4,809 lbs dry figure: half the published cargo capacity brings this plan to about 5,447 lbs, and the published GVWR of 6,084 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 publishes no floorplan description for this plan in the channel this page is built from - only the numeric specification block. Rather than describe a layout from the floorplan code, which would be a guess dressed as a fact, this page carries what the factory publishes and says where it stops. 19MSB is a IBEX designation and this site does not decode it into a layout claim.

How the 19MSB differs from the other fifteen IBEX floorplans. Most distinctive first. How these ranks are worked out.

• Cargo capacity, 1,275 lb: third-smallest of sixteen, between the 16MKS (912 lb) and the 23MBH (1,492 lb).
• Tongue weight, 710 lb: sixth-heaviest of sixteen, between the 25MLB (645 lb) and the 23MBH (750 lb).
• Tongue weight as a share of dry weight, 14.8%: shared with the 25RLSS; of sixteen, thirteen smaller and one larger, nearest the 23MBH (14.7%) and the 25RBH (16.3%).
• Exterior height, 10 ft 9 in: lowest of sixteen, level with the 19BRK and 19MBH; next are the 16MBJ, 16MKD and two others (10 ft 10 in).
• Dry weight, 4,809 lb: seventh-lightest of sixteen, between the 19MBH (4,484 lb) and the 19BRK (4,878 lb).
• GVWR, 6,084 lb: seventh-lowest of sixteen, between the 19MBH (5,984 lb) and the 19BRK (6,378 lb).
• Cargo capacity as a share of GVWR, 21%: eighth-smallest of sixteen, between the 20FKDS (20.9%) and the 23MBH (22.6%).
• Fresh tank, 30 gal: smallest of sixteen, level with the 16MBJ, 16MKD and four others; next are the 16MKS, 20FKDS and seven others (40 gal).
• Length, 24 ft 8 in: shared with the 19MBH; of sixteen, six shorter and eight longer, nearest the 20MDS (24 ft 3 in) and the 19BRK and 20MKB (25 ft).
• Grey tank, 30 gal: smallest of sixteen, level with the 16MBJ, 16MKD and five others; next are the 16MKS, 20MDS and three others (40 gal).

Next to the 19MBH, the nearest lighter floorplan by dry weight, the 19MSB is 325 lb heavier by dry weight, has a GVWR 100 lb higher, has 225 lb less cargo capacity and has a tongue weight 125 lb heavier; the two publish the same length, exterior height, fresh tank, grey tank and black tank.

Next to the 19BRK, the nearest heavier floorplan by dry weight, the 19MSB is 69 lb lighter by dry weight, has a GVWR 294 lb lower, has 225 lb less cargo capacity, has a tongue weight 100 lb heavier and is 4 in shorter; the two publish the same exterior height, fresh tank, grey tank and 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 30-gallon fresh tank is about 249 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 20% of the 19MSB’s 1,275 lb cargo capacity, leaving 1,026 lb. Across 16 IBEX floorplans the water share runs 14% to 36%, and 10 give up more than this one. Nearest on that share: IBEX 16MBJ at 17% and IBEX 20FKDS at 22%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).