Jayco Jay Flight · 2023–2025331BTS

The Jay Flight 331BTS is one of Jayco's Jay Flight travel trailers, the mass-market nameplate and the volume seller in Jayco's towable range. This page covers one model year of it — the 2025 331BTS, 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' 6" with the slide-outs run out for the 2025 model year, which is the measurement that matters for a site pitch as well as for the road.

For the 2025 model year Jayco published a 10,400-pound GVWR on a 8,680-pound dry weight, 1,720 pounds of published cargo capacity, a 1,235-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 2025 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 2024 build of the same floorplan, 7 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 2025 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 331BTS differs from the other 122 Jay Flight floorplans. Most distinctive first. Sibling pages may cover other model years than this one (2023–2025). How these ranks are worked out.

• Sleeping capacity, 12: second-largest of 110, between the 321BDS, 324BDS and two others (11) and the 33RBTS (14).
• Cargo capacity as a share of GVWR, 16.5%: twelfth-smallest of 123, between the 40LSDL (14.7%) and the 295BHS (16.8%).
• Dry tongue weight as a share of dry weight, 14.2%: twelfth-largest of 122, between the 270BHSW, 333BTS and two others (14.1%) and the JAYLOFT (14.4%).
• Dry weight, 8,680 lb: fifteenth-heaviest of 123, between the 334RTS (8,655 lb) and the 34RSBS (8,780 lb).
• Dry tongue weight, 1,235 lb: shared with the 340RLK; of 122, 109 lighter and eleven heavier, nearest the 34RLOK (1,215 lb) and the 34RSBS (1,325 lb).
• GVWR, 10,400 lb: 22nd-highest of 123, between the 340RLK (10,350 lb) and the 333BTS and 380DQS (10,500 lb).
• Black tank, 32.5 gal: shared with the 210QBW and 340RLK; of 121, sixteen smaller and 102 larger, nearest the 180LK and 180LKW (20 gal) and the 130BH, 130RD and 79 others (39 gal).
• Length, 37 ft 10 in: shared with the 333BTS, 334RTS and three others; of 123, 102 shorter and fifteen longer, nearest the 34RSBS (37 ft 8 in) and the 325BHT (38 ft 4 in).
• Exterior height, 10 ft 9 in: shared with the 295BHSW; of 109, 75 lower and 32 taller, nearest the 263BHSW, 265RLSW and 324BDS (10 ft 8 in) and the 200MKSW, 210QBW and six others (11 ft).
• Cargo capacity, 1,720 lb: 62nd-smallest of 123, between the 402RLTS (1,715 lb) and the 210QB (1,725 lb).
• Grey tank, 39 gal: shared with the 140TB, 172DB and 48 others; of 118, 27 smaller and 40 larger, nearest the 21QB (33 gal) and the 130RDW, 172DBW and seventeen others (40 gal).
• 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 334RTS (2023–2027 page), the nearest lighter floorplan by dry weight, the 331BTS is 25 lb heavier by dry weight, has a GVWR 200 lb lower, has 225 lb less cargo capacity, has a dry tongue weight 200 lb heavier, stands 5 in lower, has a grey tank 32.5 gal smaller, has a black tank 6.5 gal smaller and sleeps four more; the two publish the same length, interior height and fresh tank.

Next to the 34RSBS (2018–2023 page), the nearest heavier floorplan by dry weight, the 331BTS is 100 lb lighter by dry weight, has a GVWR 850 lb lower, has 750 lb less cargo capacity, has a dry tongue weight 90 lb lighter, is 2 in longer, stands 4 ft taller, has a fresh tank 28 gal smaller, has a grey tank 32.5 gal smaller, has a black tank 6.5 gal smaller and sleeps six more; the two publish the same interior height.

This floorplan has a published factory record for 3 model years here, 2023 to 2025. The specification does not hold still: GVWR runs from 9,995 lb (2023) to 10,400 lb (2025); dry weight runs from 8,465 lb (2023) to 8,680 lb (2025); dry tongue weight runs from 1,085 lb (2023) to 1,235 lb (2025). The published sleeping capacity changes across the years: up to 8 in 2023–2024, up to 12 in 2025. 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 7 of the published fields between the 2024 and 2025 331BTS. 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), 25% of the 331BTS’s 1,720 lb cargo capacity, leaving 1,288 lb (107 lb per rated berth). Across 123 Jay Flight floorplans the water share runs 13% to 47%, and 73 give up more than this one. Nearest on that share: Jay Flight 210QB at 25% and Jay Flight 402RLTS at 25%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).