Jayco Jay Feather Air · 2025–202618MBH

The Jay Feather Air 18MBH is one of Jayco's Jay Feather Air travel trailers, the lighter air-framed tier of the Jay Feather range. This page covers one model year of it — the 2026 18MBH, 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. Jayco publishes it at 8' 0" wide closed and 10' 0" with the slide-outs run out for the 2026 model year, which is the measurement that matters for a site pitch as well as for the road.

For the 2026 model year Jayco published a 5,700-pound GVWR on a 4,395-pound dry weight, 1,305 pounds of published cargo capacity, a 595-pound dry tongue weight. That dry tongue is 14% of the dry weight, inside 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. The 2026 trailer left the factory on ST225/75R15'E' tyres; the load range in that code is part of the axle rating and a replacement set has to match it.

Against the 2025 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 2026 trailer is close to current as of 2026, but section 05 still applies: check it against its build date rather than its model year. Jayco commonly builds a model year well before the calendar year turns, and the tyre date codes have to be read against the build month, not the badge.

How the 18MBH differs from the other 46 Jay Feather floorplans. Most distinctive first. Sibling pages may cover other model years than this one (2025–2026). How these ranks are worked out.

• Dry tongue weight as a share of dry weight, 13.5%: shared with the 26FK and 31BH; of 47, 41 smaller and three larger, nearest the 19MBS, 24FK and 27RK (13.4%) and the 30RKB (13.6%).
• Cargo capacity, 1,305 lb: thirteenth-smallest of 47, between the 17FK (1,270 lb) and the 15MRB (1,320 lb).
• GVWR, 5,700 lb: fourteenth-lowest of 47, between the 16DB (5,500 lb) and the 199MBS (5,750 lb).
• Cargo capacity as a share of GVWR, 22.9%: fourteenth-largest of 47, between the 26BHSL (22.8%) and the 16RB, 173MRB and 17FK (23.1%).
• Length, 23 ft: fourteenth-shortest of 47, between the 16DB (22 ft 11 in) and the 18RBF, 199MBS and 19MBS (23 ft 1 in).
• Dry weight, 4,395 lb: fifteenth-lightest of 47, between the 19MBS (4,325 lb) and the 199MBS (4,505 lb).
• Dry tongue weight, 595 lb: seventeenth-lightest of 47, between the 19MBS (580 lb) and the 21MBH (600 lb).
• Black tank, 38 gal: shared with the 16DB, 16FBS and ten others; of 47, 31 smaller and three larger, nearest the 22RB (34 gal) and the 23MBD and 29RL (40 gal).
• Sleeping capacity, 4: shared with the 15MRB, 166FBS and eleven others; of 47, eight smaller and 25 larger, nearest the 173MRB, 183FBS and three others (3) and the 171BH (5).
• Exterior height, 10 ft: shared with the 18RBF and 22BH; of 47, 24 lower and twenty taller, nearest the 166FBS, 16FBS and five others (9 ft 11 in) and the 22RB, 24BH and four others (10 ft 1 in).
• Grey tank, 38 gal: shared with the 15MRB, 16DB and seven others; of 47, fourteen smaller and 23 larger, nearest the 18FBS, 21MBH and two others (30.5 gal) and the 17FK (40 gal).

Next to the 19MBS (2026–2027 page), the nearest lighter floorplan by dry weight, the 18MBH is 70 lb heavier by dry weight, has a GVWR 100 lb lower, has 170 lb less cargo capacity, has a dry tongue weight 15 lb heavier, is 1 in shorter, stands 4 in taller and sleeps four fewer; the two publish the same interior height, fresh tank, grey tank and black tank.

Next to the 199MBS (2022–2025 page), the nearest heavier floorplan by dry weight, the 18MBH is 110 lb lighter by dry weight, has a GVWR 50 lb lower, has 60 lb more cargo capacity, has a dry tongue weight 40 lb lighter, is 1 in shorter, stands 2 in taller, has a grey tank 8 gal larger, has a black tank 8 gal larger and sleeps four fewer; the two publish the same interior height and fresh tank.

This floorplan has a published factory record for 2 model years here, 2025 to 2026. The specification does not hold still: GVWR runs from 5,650 lb (2025) to 5,700 lb (2026); dry weight runs from 4,395 lb (2026) to 4,400 lb (2025); dry tongue weight runs from 535 lb (2025) to 595 lb (2026). The published tire size changes over the run (ST225/75R15E, then ST225/75R15'E'). Each year’s complete record is printed separately below, carrying only that year’s own published figures and source. Nothing is copied across from a neighbouring year.

Jayco changed 6 of the published fields between the 2025 and 2026 18MBH. Every figure in both columns is that model year's own factory record — nothing here is carried across from the other year.

A full 55-gallon fresh tank is about 457 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 35% of the 18MBH’s 1,305 lb cargo capacity, leaving 848 lb (212 lb per rated berth). Across 47 Jay Feather floorplans the water share runs 23% to 43%, and 9 give up more than this one. Nearest on that share: Jay Feather 15MRB at 35% and Jay Feather 17FK at 36%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).