2026 East to West Blackthorn / Tandara3820DSL

The Blackthorn 3820DSL leaves East to West's factory at 13,439 lbs dry, with a published GVWR of 16,350 lbs and 2,911 lbs of cargo capacity between the two. Cargo capacity is 18% 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 2,911 lbs before anything else is loaded.

Pin weight is 2,350 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 7th of 7 floorplans by dry weight, in a line that runs from 7,324 lbs to 13,439 lbs. It is the heaviest plan in the line, so the tow vehicle should be settled before the floorplan is.

Plan the tow on loaded weight, not the 13,439 lbs dry figure: half the published cargo capacity brings this plan to about 14,895 lbs, and the published GVWR of 16,350 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. 3820DSL is a Blackthorn designation and this site does not decode it into a layout claim.

How the 3820DSL differs from the other six Blackthorn floorplans. Most distinctive first. How these ranks are worked out.

• Dry weight, 13,439 lb: heaviest of seven; next is the 3880RBDB (13,019 lb).
• GVWR, 16,350 lb: highest of seven; next is the 3865FLR (16,320 lb).
• Cargo capacity as a share of GVWR, 17.8%: smallest of seven; next is the 3880RBDB (19.7%).
• Pin weight, 2,350 lb: heaviest of seven; next is the 3865FLR (2,320 lb).
• Cargo capacity, 2,911 lb: second-smallest of seven, between the 229RK (2,621 lb) and the 279BH (2,941 lb).
• Pin weight as a share of dry weight, 17.5%: third-largest of seven, between the 3880RBDB (17.1%) and the 3865FLR (18.6%).
• Grey tank, 132 gal: largest of seven, level with the 3880RBDB; next is the 3750LK (108 gal).
• Black tank, 88 gal: largest of seven, level with the 3880RBDB; next are the 229RK, 279BH and three others (44 gal).
• Length, 41 ft 11 in: shared with the 3865FLR; of seven, four shorter and one longer, nearest the 3750LK (40 ft 10 in) and the 3880RBDB (42 ft 1 in).

Next to the 3880RBDB, the nearest lighter floorplan by dry weight, the 3820DSL is 420 lb heavier by dry weight, has a GVWR 130 lb higher, has 290 lb less cargo capacity, has a pin weight 130 lb heavier and is 2 in shorter; 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), 18% of the 3820DSL’s 2,911 lb cargo capacity, leaving 2,380 lb. Across 7 Blackthorn floorplans the water share runs 14% to 20%, and 1 gives up more than this one. Nearest on that share: Blackthorn 279BH at 18% and Blackthorn 229RK at 20%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).