2027 Forest River Rockwood Signature Fifth Wheels339SBH

The Rockwood Signature Fifth Wheels 339SBH leaves Forest River's factory at 8,757 lbs dry with 2,092 lbs of cargo capacity. Forest River publishes no GVWR for this line, so the loaded rating is not quoted on this page and is not computed from the other two figures. What the cargo number covers is defined by the factory: fresh water, gear, food, batteries and every dealer-installed accessory come out of it. Fresh water is 8.3 lb per gallon, so filling the 53-gallon fresh tank spends 440 lbs of the 2,092 lbs before anything else goes in.

Pin weight is 1,462 lbs, which is 17% of the dry weight. That figure lands on the truck's rear axle and comes straight off its payload rating - not its towing rating, which is the number most often quoted and the wrong one for this decision. Pin weight rises as the trailer is loaded, and a fifth wheel loaded toward its cargo capacity will put substantially more than 1,462 lbs over the bed. Read the payload figure on your own door sticker rather than a brochure maximum for the model.

Tank capacities are 53 gallons fresh, 78 grey and 39 black, 117 gallons of waste capacity against 53 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 Rockwood Signature Fifth Wheels roster this is the 3rd of 19 floorplans by dry weight, in a line that runs from 7,523 lbs to 12,824 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 these figures is to stop planning against the dry weight. Nobody tows a trailer at 8,757 lbs: that is the weight before water, batteries, propane, bedding, food, tools and anything the dealer bolted on. Load half the published cargo capacity and this plan is already near 9,803 lbs on the road. Because Forest River publishes no loaded rating for this line, the ceiling has to come from the trailer's own weight label rather than from this page, and the comparison you make against the tow vehicle should use the loaded figure.

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. There is no published GVWR on this line, so the usual arithmetic check - dry plus cargo equals the rating - has nothing to test against here. 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: “This FW bunkhouse floorplan is designed for families, featuring a private front bedroom with a king bed, dual wardrobes, and washer/dryer prep, while the rear bunkhouse offers 48" x 74" double bunks and dedicated bunk storage. The spacious living area includes a 67" theater seat, fireplace, Televator and dining table with chairs and bench, plus a large 25' awning and pass-through storage for added convenience.” 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 339SBH differs from the other eighteen Rockwood Signature Fifth Wheels. Most distinctive first. Each rank counts only the siblings that publish that field, and a figure most of them share is left out. Not every one of these pages covers the same model years as this one (2027); each figure is the one its own page prints, so a rank compares pages, not one model year.

• Dry weight, 8,757 lb: third-lightest of nineteen, between the 281SRK (7,733 lb) and the 290SFK (8,764 lb).
• Pin weight, 1,462 lb: third-lightest of nineteen, between the 301SRK (1,300 lb) and the 329SRK (1,504 lb).
• Exterior height, 13 ft: lowest of nineteen, level with the 332SRL; next are the 301SRK and 329SRK (13 ft 1 in).
• Fresh tank, 53 gal: smallest of nineteen, level with the 332SRL; next are the 281SRK, 290SFK and fifteen others (54 gal).
• Pin weight as a share of dry weight, 16.7%: seventh-smallest of nineteen, between the 281SRK (16.6%) and the 403SDB (17.1%).
• Cargo capacity, 2,092 lb: eighth-largest of nineteen, between the R374DBH (2,084 lb) and the 290SFK (2,134 lb).
• Length, 36 ft 7 in: eighth-shortest of nineteen, between the 8294BS (36 ft 2 in) and the R361RLS, R371RK and two others (36 ft 10 in).
• Grey tank, 78 gal: smallest of nineteen, level with the 281SRK, 301SRK and two others; next are the 8288SB and 8294BS (80 gal).
• Black tank, 39 gal: smallest of nineteen, level with the 281SRK, 290SFK and three others; next are the 8288SB, 8291RK and three others (50 gal).

Next to the 281SRK, the nearest lighter floorplan by dry weight, the 339SBH is 1,024 lb heavier by dry weight, has 50 lb less cargo capacity, has a pin weight 182 lb heavier, is 7 ft 3 in longer, stands 2 in lower and has a fresh tank 1 gal smaller; the two publish the same grey tank and black tank.

Next to the 290SFK, the nearest heavier floorplan by dry weight, the 339SBH is 7 lb lighter by dry weight, has 42 lb less cargo capacity, has a pin weight 173 lb lighter, is 6 ft 9 in longer, stands 3 in lower, has a fresh tank 1 gal smaller and has a grey tank 30 gal smaller; the two publish the same black tank.

Signature is where Rockwood stops being a bumper-pull range. Across the fourteen plans profiled here dry weight runs 7,523 to 12,824 lb and pin weight runs 1,280 to 2,205 lb, which is a payload question before it is a towing one -- pin weight lands on the truck's rear axle, and the heavier plans ask for more of it once passengers and a hitch are in. Pin sits in a band of 15.4 to 19.3 percent of dry weight across the whole roster, so the grouping scales predictably rather than hiding a nose-heavy outlier. Cargo capacity runs 1,461 to 2,674 lb and does not track size: the heaviest plan carries the most, but the second-least accommodating plan is a mid-weight one, so the spread is worth reading per plan rather than by length. Fresh water is 53 or 54 gallons on every plan in the roster; grey runs 78 to 131 gallons and black 39 to 92, so waste capacity is the variable that separates these plans off-grid, not fresh.

A full 53-gallon fresh tank is about 440 lb of water, 21% of the 339SBH’s 2,092 lb cargo capacity, leaving 1,652 lb. Across 19 Rockwood Signature Fifth Wheels floorplans the water share runs 17% to 31%, and 11 give up more than this one. Nearest on that share: Rockwood Signature Fifth Wheels 290SFK at 21% and Rockwood Signature Fifth Wheels 332SRL at 22%.

Closest sibling: the Rockwood Signature Fifth Wheels 332SRL, nearest on the published figures. It differs on 4 of the 7 fields both publish (this plan first): length 36 ft 7 in vs 35 ft 0 in; dry weight 8,757 lb vs 8,943 lb; cargo capacity 2,092 lb vs 2,046 lb; hitch weight 1,462 lb vs 1,535 lb. They match on fresh tank, grey tank and black tank.

Either side of it by dry weight: Rockwood Signature Fifth Wheels 281SRK is 1,024 lb lighter (7,733 lb dry); Rockwood Signature Fifth Wheels 290SFK is 7 lb heavier (8,764 lb dry).

All 19 Rockwood Signature Fifth Wheels floorplans: Rockwood Signature Fifth Wheels line hub.

Against the 339SBH: the Roamer Light Duty 304BHS is 33 lb heavier and 3 ft shorter; the Eagle 28.5RSTS is 63 lb heavier and 4 ft shorter; the Cherokee Arctic Wolf 285OPT is 119 lb lighter and 2 ft shorter.

10 of the 18 fields this catalogue tracks are published for the 339SBH. Not published: GVWR, interior height, sleeps, slide count, axle count, tire specification, refrigerator, air conditioning.

Sourcing rules: methodology.