2022 Forest River Rockwood Ultra Lite Fifth Wheels2892RB

The Rockwood Ultra Lite Fifth Wheels 2892RB leaves Forest River's factory at 10,018 lbs dry with 1,584 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 54-gallon fresh tank spends 448 lbs of the 1,584 lbs before anything else goes in.

Dry pin weight is 1,602 lbs, which is 16% 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 1,602 lbs over the bed. Read the payload figure on your own door sticker rather than a brochure maximum for the model.

Tank capacities are 54 gallons fresh, 90 grey and 90 black, 180 gallons of waste capacity against 54 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 Ultra Lite Fifth Wheels roster this is the 7th of 11 floorplans by dry weight, in a line that runs from 7,764 lbs to 10,379 lbs. It sits in the middle of the line by weight. 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 10,018 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 10,810 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 read from one factory document: Forest River's own 2022 brochure for this line, and each figure was read back against that document's text before it was published. This is a single-channel record rather than the two-page cross-check this site runs on saved factory web pages, and it is described that way rather than dressed up as more. The brochure publishes no GVWR for this line, so the loaded rating is shown as not published and is never computed from dry weight plus cargo capacity. Where a figure is missing from this page it is because the brochure does not publish it, not because it was hard to find - and the row says so rather than being quietly dropped.

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. 2892RB is a Rockwood Ultra Lite Fifth Wheels designation and this site does not decode it into a layout claim.

Dry weight runs 7,764 to 10,379 lb across the eleven plans and dry pin weight runs 1,215 to 1,761 lb. The pin figure is the one that decides whether a given truck can take the trailer, because a fifth-wheel pin load lands on the truck's payload rating rather than its towing rating - and a 1,761 lb pin will use most of the payload of a half-ton before passengers and gear are counted. Cargo capacity runs 1,584 to 2,550 lb and moves against dry weight rather than with it. Every plan carries 54 gallons of fresh water; grey is 80 or 90 gallons and black 40, 50 or 90, so the waste tanks are the one specification in this line that genuinely varies by floorplan. Travel length runs 28 ft 11 in to 37 ft.

A full 54-gallon fresh tank is about 450 lb of water, 28% of the 2892RB’s 1,584 lb cargo capacity, leaving 1,134 lb. Across 14 Rockwood Ultra Lite Fifth Wheels floorplans the water share runs 18% to 28%, and this plan’s is the highest. Nearest on that share: Rockwood Ultra Lite Fifth Wheels 2621WS at 28%.

Closest sibling: the Rockwood Ultra Lite Fifth Wheels 2887MB, nearest on the published figures. It differs on 4 of the 7 fields both publish (this plan first): dry weight 10,018 lb vs 10,229 lb; cargo capacity 1,584 lb vs 1,791 lb; dry hitch weight 1,602 lb vs 1,620 lb; black tank 90 gal vs 50 gal. They match on length, fresh tank and grey tank.

Either side of it by dry weight: Rockwood Ultra Lite Fifth Wheels 2896MB is 356 lb lighter (9,662 lb dry); Rockwood Ultra Lite Fifth Wheels 2893BS is 147 lb heavier (10,165 lb dry).

All 14 Rockwood Ultra Lite Fifth Wheels floorplans: Rockwood Ultra Lite Fifth Wheels line hub.

Against the 2892RB: the Eagle 30.5MBOK is 48 lb lighter; the Reflection 303RLS is 82 lb heavier and 4 ft shorter; the Arctic Wolf 331BH is 104 lb lighter and 2 ft longer.

9 of the 18 fields this catalogue tracks are published for the 2892RB. Not published: GVWR, interior height, sleeps, slide count, axle count, tire specification, awning, refrigerator, air conditioning.

Sourcing rules: methodology.