2026 Forest River Columbus / Puma Mesa377DS

The Columbus 377DS has 2,141 lbs of cargo capacity between 14,339 lbs dry and its 16,480 lbs GVWR, 13% of that rating; filling its 75-gallon fresh tank at 8.3 lb a gallon uses 622 lbs of it (how to read trailer weights).

Pin weight is 2,480 lbs, 17% of the dry weight as published; it rises as the trailer is loaded and comes off the truck’s payload, not its towing rating, so check it against the payload on your own door sticker (pin weight and payload).

Off hookups: 195 gallons of grey and black capacity against 75 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the Columbus roster this is the 5th of 8 floorplans by dry weight, in a line that runs from 10,464 lbs to 14,664 lbs. It sits in the middle of the line by weight.

Plan the tow on loaded weight, not the 14,339 lbs dry figure: half the published cargo capacity brings this plan to about 15,409 lbs, and the published GVWR of 16,480 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. 377DS is a Columbus designation and this site does not decode it into a layout claim.

How the 377DS differs from the other seven Columbus floorplans. Most distinctive first. Sibling pages may cover other model years than this one (2026). How these ranks are worked out.

• Pin weight as a share of dry weight, 17.3%: smallest of eight; next is the 389FLH (17.6%).
• GVWR, 16,480 lb: third-lowest of eight, between the 360FK (14,175 lb) and the 389FLH (16,555 lb).
• Cargo capacity, 2,141 lb: third-smallest of eight, between the 379MBL (2,121 lb) and the 388FKH (2,271 lb).
• Cargo capacity as a share of GVWR, 13%: third-smallest of eight, between the 379MBL (12.6%) and the 388FKH (13.6%).
• Pin weight, 2,480 lb: third-lightest of eight, between the 360FK (2,175 lb) and the 389FLH (2,555 lb).
• Dry weight, 14,339 lb: fourth-heaviest of eight, between the 384RKH (13,814 lb) and the 388FKH (14,414 lb).
• Grey tank, 117 gal: largest of eight, level with the 384RKH; next are the 388FKH and 389FLH (110 gal).
• Black tank, 78 gal: largest of eight, level with the 388FKH; next are the 383RLH and 384RKH (71 gal).
• Length, 42 ft 7 in: shared with the 379MBL and 389FLH; of eight, three shorter and two longer, nearest the 383RLH (41 ft 5 in) and the 388FKH (42 ft 10 in).

Next to the 384RKH, the nearest lighter floorplan by dry weight, the 377DS is 525 lb heavier by dry weight, has a GVWR 210 lb lower, has 735 lb less cargo capacity, has a pin weight 210 lb lighter, is 5 in shorter and has a black tank 7 gal larger; the two publish the same exterior height, fresh tank and grey tank.

Next to the 388FKH, the nearest heavier floorplan by dry weight, the 377DS is 75 lb lighter by dry weight, has a GVWR 205 lb lower, has 130 lb less cargo capacity, has a pin weight 205 lb lighter, is 3 in shorter and has a grey tank 7 gal larger; the two publish the same exterior height, fresh tank and black tank.

Columbus is a tight roster of six large fifth wheels and the numbers barely move across it: 13,609 to 14,664 lb dry over lengths of 41 feet 5 inches to 43 feet. What does move is cargo capacity, 2,026 to 3,026 lb - a thousand-pound spread on trailers within a thousand pounds of each other dry, so the useful comparison inside this line is payload rather than size. Pin weight runs 2,480 to 2,785 lb, and every plan ties out exactly against its published GVWR.

A full 75-gallon fresh tank is about 622 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 29% of the 377DS’s 2,141 lb cargo capacity, leaving 1,518 lb. Across 8 Columbus floorplans the water share runs 21% to 31%, and 2 give up more than this one. Nearest on that share: Columbus 388FKH at 27% and Columbus 379MBL at 29%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).