2026 East to West Blackthorn / Tandara3880RBDB

The Blackthorn 3880RBDB leaves East to West's factory at 13,019 lbs dry, with a published GVWR of 16,220 lbs and 3,201 lbs of cargo capacity between the two. Cargo capacity is 20% of the loaded rating, and East to West'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 64-gallon fresh tank spends 531 lbs of that 3,201 lbs before anything else is loaded.

Pin weight is 2,220 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: 220 gallons of grey and black capacity against 64 gallons of fresh water, so fresh water runs out first (tank sizes by length).

Against the rest of the Blackthorn roster this is the 6th of 7 floorplans by dry weight, in a line that runs from 7,324 lbs to 13,439 lbs. It sits in the heavier third of the line.

Plan the tow on loaded weight, not the 13,019 lbs dry figure: half the published cargo capacity brings this plan to about 14,619 lbs, and the published GVWR of 16,220 lbs is the limit (how to read trailer weights).

East to West’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 East to West does not publish that figure (how figures are verified).

East to West 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. 3880RBDB is a Blackthorn designation and this site does not decode it into a layout claim.

How the 3880RBDB differs from the other six Blackthorn floorplans. Most distinctive first. How these ranks are worked out.

• Length, 42 ft 1 in: longest of seven; next are the 3820DSL and 3865FLR (41 ft 11 in).
• Dry weight, 13,019 lb: second-heaviest of seven, between the 3750LK (12,619 lb) and the 3820DSL (13,439 lb).
• Cargo capacity as a share of GVWR, 19.7%: second-smallest of seven, between the 3820DSL (17.8%) and the 3750LK (21.7%).
• GVWR, 16,220 lb: third-highest of seven, between the 3750LK (16,120 lb) and the 3865FLR (16,320 lb).
• Pin weight, 2,220 lb: third-heaviest of seven, between the 2990MK (2,180 lb) and the 3865FLR (2,320 lb).
• Cargo capacity, 3,201 lb: fourth-smallest of seven, between the 279BH (2,941 lb) and the 2990MK (3,316 lb).
• Pin weight as a share of dry weight, 17.1%: fourth-smallest of seven, between the 3750LK (16.8%) and the 3820DSL (17.5%).
• Grey tank, 132 gal: largest of seven, level with the 3820DSL; next is the 3750LK (108 gal).
• Black tank, 88 gal: largest of seven, level with the 3820DSL; next are the 229RK, 279BH and three others (44 gal).

Next to the 3750LK, the nearest lighter floorplan by dry weight, the 3880RBDB is 400 lb heavier by dry weight, has a GVWR 100 lb higher, has 300 lb less cargo capacity, has a pin weight 100 lb heavier, is 1 ft 3 in longer, has a grey tank 24 gal larger and has a black tank 44 gal larger; the two publish the same exterior height and fresh tank.

Next to the 3820DSL, the nearest heavier floorplan by dry weight, the 3880RBDB is 420 lb lighter by dry weight, has a GVWR 130 lb lower, has 290 lb more cargo capacity, has a pin weight 130 lb lighter and is 2 in longer; the two publish the same exterior height, fresh tank, grey tank and black tank.

Blackthorn is the fifth-wheel end of the East to West range, and it is the one East to West roster where the loaded rating is a published factory number rather than a gap. All seven floorplans carry a GVWR and all seven tie out exactly against dry weight plus cargo capacity -- 9,945 lb at the light end to 16,350 lb at the top. The roster splits in two. Two plans sit in the factory's half-ton grouping at 7,324 and 8,579 lb dry with 1,145 and 1,320 lb on the pin; the other five run 10,864 to 13,439 lb dry with 2,120 to 2,350 lb on the pin. Every one of the seven is a fifth wheel, so that pin load comes off the truck's payload rating rather than its towing rating, and the half-ton grouping is a statement about weight rather than about hitch type. Cargo capacity runs 2,621 to 3,876 lb, and lengths run 28 ft 1 in to 42 ft 1 in.

A full 64-gallon fresh tank is about 531 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 17% of the 3880RBDB’s 3,201 lb cargo capacity, leaving 2,670 lb. Across 7 Blackthorn floorplans the water share runs 14% to 20%, and 3 give up more than this one. Nearest on that share: Blackthorn 2990MK at 16% and Blackthorn 279BH at 18%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).