Jayco Octane · 2018–2019273

The Octane 273 is one of Jayco's Octane travel-trailer toy haulers, built around a rear garage behind the living space and towed on a conventional hitch rather than a fifth-wheel pin. This page covers one model year of it — the 2019 273, exactly as Jayco published it — because the numbers that decide whether your truck can pull this trailer are not the same from one year to the next.

For the 2019 model year Jayco published a 9,950-pound GVWR on a 6,400-pound dry weight, 3,550 pounds of published cargo capacity, a 1,080-pound dry tongue weight. That dry tongue is 17% of the dry weight, above the 10–15% band conventionally quoted for a bumper-pull trailer. Tongue weight is not fixed — it moves with how the trailer is loaded, and weight added ahead of the axles raises it. A tongue load in that range wants a weight-distribution hitch, and the tow vehicle's tongue-weight limit is a separate number from its trailer-weight limit — check the loaded tongue against the hitch receiver's rating and the vehicle's payload, not against the tow rating alone.

Against the 2018 build of the same floorplan, 6 published fields moved. The full comparison is in section 02, and it is drawn from two separate verified factory records rather than from one record and an assumption about the other.

A 2019 trailer is 7 model years old as of 2026, which puts it squarely in used-buyer territory. Section 05 sets out what to inspect on a travel trailer of this age — tyre date codes, roof and seam sealant, slide seals, and the soft-floor and delamination checks that separate a tidy coach from an expensive one.

This floorplan has a verified factory record for 2 model years here, 2018 to 2019, and the specification does not hold still. Across those years dry weight ranges from 6,400 lb in 2019 to 6,420 lb in 2018, a spread of 20 lb; dry tongue weight ranges from 1,045 lb in 2018 to 1,080 lb in 2019, a spread of 35 lb. That is why each model year has its own page below, carrying only its own published figures. Nothing on a year page is copied across from a neighbouring year.

Jayco changed 6 of the published fields between the 2018 and 2019 273. Every figure in both columns is that model year's own factory record — nothing here is carried across from the other year.

Cargo capacity on the 273 is 3,550 pounds — the entire budget for gear, water, propane, batteries and everything else you put aboard.

The published dry tongue weight of 1,080 pounds is 17% of the 6,400-pound dry weight — at or above the top of the usual 10–15% band before you load anything. A nose-heavy dry figure eats truck payload directly, so budget the hitch load against your door-jamb sticker rather than against the tow rating.

Nothing above changes the ceiling. Loaded to its 9,950-pound GVWR the 273 is towing 3,550 pounds more than its 6,400-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.

Ranked by GVWR, the 273 sits 4 of 32 in the Seismic line: 9,950 pounds against a line that runs from 7,500 to 21,000 pounds. That position is the useful thing to know, because the plans immediately either side of it are the real alternatives.

Either side of it in the same line: Seismic 222 is 1,950 pounds lighter at 8,000 lb GVWR; and Seismic 260 is 45 pounds heavier at 9,995 lb GVWR.

Against the 273: the Eagle 306RKDS is 5 ft longer; the Momentum 17MAV is 8 ft shorter; the Puma 31FKRK is 20 lb lighter and 7 ft longer. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.

Those are the nearest travel trailers from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.

For scale, the Seismic floorplans profiled here run 4,700 to 16,075 pounds dry and 21 to 47 feet of exterior length across 32 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.

Every profiled floorplan in this line, with the full weight table, is on the Seismic line hub.

This catalog tracks 18 specification fields per floorplan. Named sources publish 7 of them for the 273. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.

Not published for this floorplan: exterior height, fresh tank, grey tank, black tank, sleeps, slide count, axle count, tire specification, awning, refrigerator, air conditioning. If you find one of these in a manufacturer document for this plan, it belongs on this page.

The completeness figure at the foot of this page (36%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.

How every figure here was sourced and checked is set out on the methodology page.