01 What makes the 2023 31MB different
The Eagle 31MB sits in the full-size tier of Jayco's Eagle fifth wheels, above the half-ton Eagle HT and below the luxury North Point and Pinnacle coaches. This page covers one model year of it — the 2023 31MB, 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' 1" wide closed and 11' 4" with the slide-outs run out for the 2023 model year, which is the measurement that matters for a site pitch as well as for the road.
For the 2023 model year Jayco published a 12,750-pound GVWR on a 10,465-pound dry weight, 2,285 pounds of published cargo capacity, a 1,880-pound dry pin weight. A pin weight in that range lands well outside half-ton territory: plan on a three-quarter-ton or larger truck, and check the loaded pin against the truck's payload and rear-axle ratings rather than against the tow rating alone. The 2023 coach left the factory on ST235/85R16'E' tyres; the load range in that code is part of the axle rating and a replacement set has to match it.
This is the earliest 31MB model year with a verified factory record in this catalogue. Later years are linked at the foot of the page, each with its own published figures.
A 2023 coach is 3 model years old as of 2026, which puts it squarely in used-buyer territory. Section 05 sets out what to inspect on a laminated-wall fifth wheel 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.
02 Full 2023 specifications
Dimensions
- Exterior length
- 37' 4"
- Exterior width
- 8' 1"
- Width, slides out
- 11' 4"
- Exterior height
- 12' 6"
- Exterior height (w/ A/C)
- 12' 6"
- Interior height (main)
- 8' 1"
Weights
- Dry / unit base weight (UVW)
- 10,465 lbs
- GVWR (max loaded)
- 12,750 lbs
- Net cargo / payload (CCC)
- 2,285 lbs
- Dry pin weight
- 1,880 lbs
Running gear
- Tire size
- ST235/85R16'E'
- Hitch type
- Fifth-wheel (in-bed)
- Model year of record
- 2023
Capacities
- Fresh water
- 81.0 gal
- Grey water
- 80.0 gal
- Black water
- 43.0 gal
- LP / propane
- 60 lbs
- LP / propane, optional
- 80 lbs
Galley & systems
- Water heater
- Tankless
- Furnace output
- 35000 BTU
- Furnace, auto-ignition
- 35000 BTU
- Outside storage compartments
- 2
Sleeping
- Sleeps
- up to 7
Verified specs, drawn to scale
Original graphics built from this floorplan’s own verified figures.
Loaded weight budget
Size, drawn to scale
Holding tanks
These graphics are generated from the same verified record that builds the table above, and are published under this site’s own licence — nothing here is traced from, or derived from, a manufacturer drawing or photo. Where a figure is not published for this plan, the graphic that would need it is omitted rather than estimated. The full record is in the published dataset.
What it takes to tow this
Built from this floorplan’s verified weights. We publish the trailer side only.
We do not publish tow ratings for specific trucks. A single model can vary by thousands of pounds depending on engine, axle ratio, cab, drivetrain and package — the only authoritative figure is the one on your own door jamb. Loaded pin percentages are industry convention for fifth wheels (15–25% of loaded weight), not a measurement of this unit. Hitch classes are not used here as a rating: SAE J684 covers trailers to 10,000 lb GVWR and does not define Class V, and capacity boundaries differ between manufacturers — read the rating stamped on your hitch.
03 What changed for the 2023 model year
2023 is the earliest model year of the 31MB that this catalogue has a verified factory record for, so there is no earlier year here to compare it against. The years we do publish run 2023 to 2024; each one is linked below.
| Model year | Dry (UVW) | GVWR | Dry pin | Sleeps | Tire size |
|---|---|---|---|---|---|
| 2023 | 10,465 | 12,750 | 1,880 | 7 | ST235/85R16'E' |
| 2024 | 10,690 | 12,750 | 2,025 | 7 | ST235/85R16'E' |
Every row is that model year's own factory record. The all-years overview for this floorplan, with the family history and the full line, is on the Jayco Eagle 31MB parent page.
No published field moved
Jayco's published record for the 2023 31MB matches the adjacent year field for field.
Where these numbers come from
Every figure on this page is read from Jayco's own 2023 model page for the 31MB — one source, one model year, no blending. The all-years parent page additionally holds a figure from a second publisher for some fields and publishes both where they disagree, without picking a winner. If the two pages differ on a weight, that is the disclosure working, not an error.
04 Buying a 2023 31MB at 3 model years old
Tyres are the first thing to age out
RV tyres are usually replaced on age rather than tread, at roughly five to seven years from the DOT date code on the sidewall. On a 3-year-old coach the originals (ST235/85R16'E') may still be fitted — read the four-digit date code, not the tread.
Roof and seam sealant is on a service interval
Laminated-wall fifth wheels rely on sealant at every roof penetration and along the front cap. Inspection is typically annual and re-sealing every few years; ask for the service records rather than assuming.
Weigh it before you tow it
Every weight on this page is a DRY factory figure for the 2023 model year. A used coach carries its previous owner's additions, and a fifth wheel puts roughly 15-25% of the load through the truck's rear axle. Weigh the loaded rig at a public scale and check it against the truck's payload, rear-axle and hitch ratings.
05 How it compares — and to its other years
The same floorplan one model year later, with its own published weights.
The parent page for this floorplan: every model year we hold, side by side.
06 Loading it for a trip
Fresh water is the single biggest line in this floorplan’s load plan. A full 81-gallon tank is about 30% of the 2,285-pound cargo capacity — enough that whether you tow with water aboard is a real decision on the 31MB rather than a detail.
| Weight budget | Figure | What it means |
|---|---|---|
| Cargo capacity as published (CCC) | 2,285 lb | Everything you add: gear, water, propane, batteries, food, people’s belongings. |
| Fresh tank filled (81 gal × 8.34 lb) | −676 lb | Water is the heaviest thing most owners add, and it is added first. |
| Cargo budget left with a full fresh tank | 1,609 lb | 30% of this plan’s capacity is spent before a single bag is loaded. |
| Per sleeping position, water aboard | 230 lb | A rough share of what is left across the 7 berths this plan sleeps. |
The published dry pin weight of 1,880 pounds is 18% of this floorplan’s 10,465-pound dry weight. Fifth-wheel pin weight rides in the bed of the truck, so it comes off payload rather than off tow rating — and it rises with the trailer as you load it, not in proportion to what you put over the axles.
Nothing above changes the ceiling. Loaded to its 12,750-pound GVWR the 31MB is towing 2,285 pounds more than its 10,465-pound dry figure, and that is the number your vehicle has to be rated for — not the brochure weight.
Tank balance is generous here: 81 gallons of fresh against 80 grey and 43 black, so waste capacity keeps pace with supply and the fresh tank is the constraint that ends a dry stay.
07 Where this floorplan sits
| Comparable fifth wheels | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 31MB | 12,750 | 10,465 | 7 | 37 ft 4 in |
| Cougar 316RLS | 12,900 | 10,792 | 6 | 35 ft 8 in |
| Roamer 32RLTS | 13,200 | 11,050 | — | 36 ft 7 in |
| Cardinal 32CHILL | 12,188 | 9,688 | — | 35 ft 3 in |
| Wildcat 32LIVE | 13,500 | 10,363 | 4 | 36 ft 5 in |
| Reflection 32BH | 11,995 | 9,468 | 7 | 35 ft 10 in |
| Open Range 3X 287RLS | 13,900 | 11,670 | — | 34 ft 7 in |
Against the 31MB: the Cougar 316RLS is 150 lb heavier and 2 ft shorter and sleeps 1 fewer; the Roamer 32RLTS is 450 lb heavier; the Cardinal 32CHILL is 562 lb lighter and 2 ft shorter. 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 fifth wheels 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 Eagle floorplans profiled here run 6,560 to 13,030 pounds dry and 28 to 43 feet of exterior length across 81 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 Eagle line hub.
08 Common questions about the 31MB
How much does the 31MB weigh?
It leaves the factory at 10,465 pounds dry, and its manufacturer-set loaded ceiling (GVWR) is 12,750 pounds. Real towing weight lands between the two and depends entirely on what you load. Use the GVWR when matching a tow vehicle; the dry figure is only useful for comparing floorplans against each other.
How much can the 31MB carry?
Cargo carrying capacity is 2,285 pounds. That is the whole budget: water, propane, batteries, gear and everything you bring. Filling the 81-gallon fresh tank uses about 676 pounds of that.
What is the pin weight of the 31MB?
The published dry pin weight is 1,880 pounds. It is measured empty; loaded, it runs higher, and it comes out of your tow vehicle’s payload rather than its tow rating.
What size tow vehicle does the 31MB need?
Your vehicle needs a tow rating of at least 12,750 pounds — this floorplan’s GVWR — and enough payload left over for the hitch load, passengers and anything in the bed. This site does not publish tow ratings for specific vehicles, because one truck model varies by thousands of pounds across engine, axle ratio, cab and package. The figure that governs is the payload sticker on your own door jamb.
How many people does the 31MB sleep?
It is rated to sleep 7. Rated sleeping positions include convertible furniture, so count the beds against how you actually travel rather than against the number.
What are the tank capacities on the 31MB?
Fresh 81 gallons, grey 80 gallons, black 43 gallons. Tank sizes set how long the floorplan can sit away from hookups, and the smallest of the three is what ends the stay.
How long is the 31MB?
Exterior length is 37' 4". Measure against your site length and your storage before committing — the exterior figure is the one that has to fit, and it includes the tongue or pin box.
Every figure in these answers is read from this page’s verified specification table. Where the manufacturer publishes nothing, the question is not answered rather than estimated.
09 What this page publishes, and what it does not
This catalog tracks 18 specification fields per floorplan. Named sources publish 13 of them for the 31MB. 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: slide count, axle count, 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 (100%) 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.
11 NHTSA safety record
This floorplan belongs to the Eagle line, and NHTSA holds 44 recall campaigns and 114 owner complaints against that line. They are separate records and are not added together — a recall is a manufacturer-confirmed defect with a remedy; a complaint is one owner’s account, which NHTSA does not verify.
What to look at on a used one. Across the 114 complaints filed on this line the most-reported components are tires (23%), structure (18%) and equipment (13%). That is where owners of this family have had trouble, so it is where an inspection is worth the time.
Recall coverage is not complete — our harvest of NHTSA’s recall API ran 1,556 queries, of which 0 failed and 242 returned an explicit zero. A line can still be under-reported where NHTSA files a roster under a parent name, or where a match rests on the wording of the recall rather than its model field. Complaints come from the complete bulk file but are unverified and self-selected: a high count tracks how many units a line sold at least as much as how well it was built. Check a specific VIN at NHTSA before you buy. Full tables are on the Eagle line page.