2027 Forest River Sierra3480RL

The Sierra 3480RL leaves Forest River's factory at 11,509 lbs dry, with a published GVWR of 14,609 lbs and 3,100 lbs of cargo capacity between the two. Cargo capacity is 21% 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 70-gallon fresh tank spends 581 lbs of that 3,100 lbs before anything else is loaded.

Pin weight is 1,965 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 1,965 lbs over the bed. Read the payload figure on your own door sticker rather than a brochure maximum for the model.

Tank capacities are 70 gallons fresh, 104 grey and 52 black, 156 gallons of waste capacity against 70 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 Sierra roster this is the 2nd of 9 floorplans by dry weight, in a line that runs from 10,869 lbs to 13,864 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 11,509 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 13,059 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 14,609 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 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. 3480RL is a Sierra designation and this site does not decode it into a layout claim.

How the 3480RL differs from the other eight Sierra floorplans. 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.

• Pin weight, 1,965 lb: lightest of nine; next is the 4003MB (2,010 lb).
• Dry weight, 11,509 lb: second-lightest of nine, between the 3100RD (10,869 lb) and the 3990FL (12,439 lb).
• GVWR, 14,609 lb: second-lowest of nine, between the 3100RD (13,969 lb) and the 3990FL (15,375 lb).
• Cargo capacity as a share of GVWR, 21.2%: second-largest of nine, between the 3990FL (19.1%) and the 3100RD (22.2%).
• Length, 38 ft 6 in: second-shortest of nine, between the 3100RD (34 ft 9 in) and the 3710HBFB, 3844QUAD and two others (42 ft 9 in).
• Pin weight as a share of dry weight, 17.1%: fourth-smallest of nine, between the 3844QUAD (16.6%) and the 4002FB (18.2%).
• Cargo capacity, 3,100 lb: largest of nine, level with the 3100RD; next is the 3990FL (2,936 lb).
• Fresh tank, 70 gal: largest of nine, level with the 3100RD; next are the 3710HBFB, 3800RK and five others (50 gal).
• Grey tank, 104 gal: shared with the 3100RD, 3710HBFB and 3844QUAD; of nine, four smaller and one larger, nearest the 3800RK, 4002FB and 4003MB (100 gal) and the 3900HBLR (136 gal).
• Black tank, 52 gal: shared with the 3100RD; of nine, three smaller and four larger, nearest the 3800RK, 3990FL and 4003MB (50 gal) and the 3844QUAD (82 gal).

Next to the 3100RD, the nearest lighter floorplan by dry weight, the 3480RL is 640 lb heavier by dry weight, has a GVWR 640 lb higher, has a pin weight 80 lb lighter, is 3 ft 9 in longer and stands 1 in lower; the two publish the same cargo capacity, fresh tank, grey tank and black tank.

Next to the 3990FL (2026 page), the nearest heavier floorplan by dry weight, the 3480RL is 930 lb lighter by dry weight, has a GVWR 766 lb lower, has 164 lb more cargo capacity, has a pin weight 860 lb lighter, is 5 ft shorter, has a fresh tank 20 gal larger, has a grey tank 24 gal larger and has a black tank 2 gal larger; the two publish the same exterior height.

Eight 2027 Sierra floorplans with a full factory record. They run 10,869 to 14,384 lb dry on lengths of 34 feet 9 inches to 44 feet, with hitch weights of 1,965 to 2,595 lb and cargo capacities of 1,601 to 3,191 lb. Forest River publishes a GVWR for all eight, from 13,969 to 16,445 lb, and dry weight plus cargo capacity equals it exactly on every one.

A full 70-gallon fresh tank is about 581 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 19% of the 3480RL’s 3,100 lb cargo capacity, leaving 2,519 lb. Across 9 Sierra floorplans the water share runs 14% to 19%, and 1 gives up more than this one. Nearest on that share: Sierra 3844QUAD at 17% and Sierra 3100RD at 19%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).

Closest sibling: the Sierra 3100RD, nearest on the published figures. It differs on 4 of the 8 fields both publish (this plan first): length 38 ft 6 in vs 34 ft 9 in; dry weight 11,509 lb vs 10,869 lb; GVWR 14,609 lb vs 13,969 lb; hitch weight 1,965 lb vs 2,045 lb. They match on cargo capacity, fresh tank, grey tank and black tank.

Either side of it by GVWR: Sierra 3100RD is 640 lb lighter (13,969 lb GVWR); Sierra 3990FL is 766 lb heavier (15,375 lb GVWR).

All 9 Sierra floorplans: Sierra line hub.

Against the 3480RL: the Cherokee Arctic Wolf 39LEAH.G is 59 lb heavier and 7 ft longer; the Wolf Pack 290PACK13 is 139 lb lighter; the Nightfall 270N is 150 lb heavier and 6 ft shorter.

11 of the 18 fields this catalogue tracks are published for the 3480RL. Not published: interior height, sleeps, slide count, axle count, tire specification, refrigerator, air conditioning.

Sourcing rules: methodology.