Jayco Jay Flight Bungalow · 2021–202640RLTS

The Jay Flight Bungalow 40RLTS is one of Jayco's Jay Flight Bungalow destination trailers, the largest and most residential end of the Jay Flight range, built to be parked for a season rather than moved every weekend. This page covers one model year of it — the 2026 40RLTS, 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' 6" wide closed and 14' 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 13,500-pound GVWR on a 11,560-pound dry weight, 1,940 pounds of published cargo capacity, a 1,630-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 ST235/80R16'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, 5 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 40RLTS differs from the other 122 Jay Flight floorplans. Most distinctive first. Sibling pages may cover other model years than this one (2021–2026). How these ranks are worked out.

• Dry tongue weight, 1,630 lb: third-heaviest of 122, between the 404LOFT (1,610 lb) and the JAYLOFT (1,775 lb).
• GVWR, 13,500 lb: seventh-highest of 123, between the 401LOFT (13,400 lb) and the 404LOFT (13,600 lb).
• Dry weight, 11,560 lb: eighth-heaviest of 123, between the 40FKDS (10,510 lb) and the 401LOFT (11,575 lb).
• Cargo capacity as a share of GVWR, 14.4%: ninth-smallest of 123, between the 40DLFT (14.3%) and the 40LOFT (14.5%).
• Exterior height, 12 ft 1 in: shared with the 402RLTS; of 109, 99 lower and eight taller, nearest the 401FLTS and 40FKDS (12 ft) and the 255THW (12 ft 2 in).
• Interior height, 8 ft: shared with the 263BHSW, 401FLTS and two others; of 123, 112 lower and six taller, nearest the 200MKS, 200MKSW and 77 others (6 ft 9 in) and the 255THW (8 ft 5 in).
• Length, 40 ft 4 in: shared with the 380DQS, 38FDDS and 401FLTS; of 123, 109 shorter and ten longer, nearest the 325BHT (38 ft 4 in) and the 38BHDS and 402RLTS (40 ft 6 in).
• Dry tongue weight as a share of dry weight, 14.1%: shared with the 270BHSW, 333BTS and 335BHS; of 122, 106 smaller and twelve larger, nearest the 178DBSW, 242BHS and 261BHSW (14%) and the 331BTS (14.2%).
• Grey tank, 32.5 gal: shared with the 321BDS, 324BDS and four others; of 118, nineteen smaller and 92 larger, nearest the 180LK and 180LKW (20 gal) and the 21QB (33 gal).
• Sleeping capacity, 4: shared with the 130BH, 130BHW and 23 others; of 110, five smaller and 79 larger, nearest the 140TB, 140TBW and three others (2) and the 174BH, 212QB and four others (5).
• Cargo capacity, 1,940 lb: shared with the JAYLOFT; of 123, 82 smaller and 39 larger, nearest the 265MWS (1,930 lb) and the 334RTS (1,945 lb).
• Fresh tank, 52 gal: shared with the 200MKS, 210QB and 47 others; of 123, 31 smaller and 42 larger, nearest the 40LOFT (51 gal) and the 40FKDS (53 gal).

Next to the 40FKDS (2021–2024 page), the nearest lighter floorplan by dry weight, the 40RLTS is 1,050 lb heavier by dry weight, has a GVWR 500 lb higher, has 550 lb less cargo capacity, has a dry tongue weight 30 lb heavier, is 8 in shorter, stands 1 in taller, has a fresh tank 1 gal smaller and has a grey tank 45.5 gal smaller; the two publish the same interior height, black tank and sleeping capacity.

Next to the 401LOFT (2026–2027 page), the nearest heavier floorplan by dry weight, the 40RLTS is 15 lb lighter by dry weight, has a GVWR 100 lb higher, has 115 lb more cargo capacity, has a dry tongue weight 165 lb heavier, is 1 ft 8 in shorter, stands 9 in lower, has 10 in less interior height and sleeps four fewer; the two publish the same fresh tank, grey tank and black tank.

This floorplan has a published factory record for 5 model years here, 2021 to 2026. The specification does not hold still: GVWR runs from 13,000 lb (2021) to 13,500 lb (2026); dry weight runs from 10,555 lb (2023) to 11,560 lb (2026); dry tongue weight runs from 1,495 lb (2021) to 1,630 lb (2026). The published sleeping capacity changes across the years: 4 in 2021, up to 4 in 2023, up to 6 in 2024, up to 4 in 2025–2026. 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 5 of the published fields between the 2025 and 2026 40RLTS. Every figure in both columns is that model year's own factory record — nothing here is carried across from the other year.

A full 52-gallon fresh tank is about 432 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 22% of the 40RLTS’s 1,940 lb cargo capacity, leaving 1,508 lb (377 lb per rated berth). Across 123 Jay Flight floorplans the water share runs 13% to 47%, and 92 give up more than this one. Nearest on that share: Jay Flight 255THW at 22% and Jay Flight JAYLOFT at 22%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).