01 What makes it unique
KZ lists the 2024 Sportster 331TH13 at 9,800 lb dry, a GVWR of 12,995 lb, a net carrying capacity of 3,195 lb and a pin weight of 2,300 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
It is 38' 6" long and 12' 7" high. KZ prints its tanks as 75 gal fresh, 32 gal grey, 32 gal black.
Among the 5 Sportster floorplans KZ’s 2024 Sportster brochure lists with a published dry weight, it is number 4 from the lightest, in a range from 6,840 lb (Sportster 270THR) to 11,070 lb (Sportster 353TH13). Every figure in that comparison is KZ’s, for the same model year.
Every number on this page was read on 6 Nov 2026 from KZ’s 2024 Sportster brochure, the maker’s own dated document for model year 2024.
How the 331TH13 differs from the other four Sportster floorplans. Most distinctive first. How these ranks are worked out.
- Cargo capacity, 3,195 lb: largest of five; next is the 280TH (3,190 lb).
- Dry weight, 9,800 lb: second-heaviest of five, between the 280TH (8,310 lb) and the 353TH13 (11,070 lb).
- GVWR, 12,995 lb: second-highest of five, between the 280TH (11,500 lb) and the 353TH13 (13,995 lb).
- Cargo capacity as a share of GVWR, 24.6%: second-smallest of five, between the 353TH13 (20.9%) and the 301THR (25.3%).
- Pin weight, 2,300 lb: second-lightest of three, between the 280TH (1,680 lb) and the 353TH13 (2,640 lb).
- Pin weight as a share of dry weight, 23.5%: second-smallest of three, between the 280TH (20.2%) and the 353TH13 (23.8%).
- Length, 38 ft 6 in: second-longest of five, between the 301THR (35 ft 10 in) and the 353TH13 (40 ft 6 in).
- Grey tank, 32 gal: smallest of five, level with the 270THR; next are the 280TH and 353TH13 (50 gal).
- Sleeping capacity, 8: largest of five, level with the 301THR; next is the 280TH (7).
Next to the 280TH, the nearest lighter floorplan by dry weight, the 331TH13 is 1,490 lb heavier by dry weight, has a GVWR 1,495 lb higher, has 5 lb more cargo capacity, has a pin weight 620 lb heavier, is 6 ft longer, has a grey tank 18 gal smaller, has a black tank 18 gal smaller and sleeps one more; the two publish the same exterior height, interior height and fresh tank.
Next to the 353TH13, the nearest heavier floorplan by dry weight, the 331TH13 is 1,270 lb lighter by dry weight, has a GVWR 1,000 lb lower, has 270 lb more cargo capacity, has a pin weight 340 lb lighter, is 2 ft shorter, has a grey tank 18 gal smaller, has a black tank 50 gal smaller and sleeps two more; the two publish the same exterior height, interior height and fresh tank.
02 Full specifications
Dimensions
- Exterior length
- 38' 6"
- Exterior height
- 12' 7"
- Exterior width
- 102"
- Interior height
- 95"
Weights
- Dry / unit base weight (UVW)
- 9,800 lb
- GVWR (max loaded)
- 12,995 lb
- Net cargo / payload (CCC)
- 3,195 lb
- Hitch / pin weight
- 2,300 lb
Capacities
- Fresh water
- 75 gal
- Grey water
- 32 gal
- Black water
- 32 gal
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- 16"
Sleeping & layout
- Sleeps
- 8
- Dry Axle Weight*
- 7,500
- Refrigerator (cu. feet)
- 8
- Water Heater Cap. (on-demand tankless)
- *** (footnote: "***Infinite supply.")
- LP Gas Cap. (lbs.)
- 60
- Furnace BTUs (1,000s)
- 30
- Weight basis (as printed)
- UVW / Dry Hitch / Dry Axle carry the footnote "*This weight reflects the rolling average unit weight for each model. Your trailer weight will vary according to optional equipment."
- Exterior length note (as printed)
- "**For travel trailers, exterior length is measured from rear of bumper to leading edge of coupler. For fifth wheels, exterior length is measured from rear of bumper to center of coupler."
- Model year source
- Printed in the brochure: "2024 SPORTSTER TRAVEL TRAILER TOY HAULERS" / "2024 SPORTSTER FIFTH WHEEL TOY HAULERS"; KZ files it at kz-rv.com/brochures/2024/.
- Line relationship note
- KZ's archive shows Sportster books 2017-2024 and "Sportster X" from 2025 (sportster-x hub on site). Codes do not overlap the 2027 Sportster X roster (20X, 22X, 26X, 3018X, 33X, 3411X, 3914X). Whether this is a predecessor badge of Sportster X is a naming call, not decided here.
- Awning
- 19'
How these published figures sit against the rest of the catalogue: travel trailer tongue weight by size; fresh, grey and black tank sizes; camper trailer size chart.
Drawn to scale
Weight budget
Size, with end view
Holding tanks
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
Towing it
Check your vehicle. Enter the ratings from your owner’s manual and the door-pillar placard.
Compares your figures with this page’s published GVWR (12,995 lb) and the upper loaded pin estimate (3,249 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern.
Loaded range: 15–25% of GVWR on the pin, a rule of thumb, not a measurement of this unit. No truck ratings or hitch classes (why; NHTSA, DOT HS 809 433). The range starts at the published figure, because loaded is never lighter than that.
03 The Sportster floorplan family
KZ’s 2024 Sportster brochure lists 5 Sportster floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Sportster 270THR | 30' 8" | 4 | Profiled |
| Sportster 301THR | 35' 10" | 8 | Profiled |
| Sportster 280TH | 32' 6" | 7 | Profiled |
| Sportster 331TH13 | 38' 6" | 8 | Profiled |
| Sportster 353TH13 | 40' 6" | 6 | Profiled |
KZ’s 2024 Sportster brochure lists 5 Sportster floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What KZ does not publish for the Sportster 331TH13
Nothing is filled from a sibling model, a different model year or a dealer listing.
Read the label on the trailer
Federal rules put a load-carrying label inside every RV trailer: its unloaded weight with full propane, its cargo carrying capacity and its GVWR (49 CFR 571.110 and 571.120). Those figures come from the trailer itself and govern the towing decision.
05 How it compares
8,310 lb dry and 11,500 lb GVWR, against this model’s 9,800 lb and 12,995 lb.
11,070 lb dry and 13,995 lb GVWR, against this model’s 9,800 lb and 12,995 lb.
06 Loading it for a trip
A full 75-gallon fresh tank is about 622 lb of water (water counts as cargo: 49 CFR 571.120 S10.4.2), 19% of the Sportster 331TH13’s 3,195 lb cargo capacity, leaving 2,572 lb (322 lb per rated berth). Across 5 Sportster floorplans the water share runs 19% to 22%, and this plan’s is the lowest. Nearest on that share: Sportster 280TH at 20%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.120 S10.4.3).
07 Where this floorplan sits
Closest sibling: the Sportster 301THR, nearest on the published figures. It differs on 6 of the 9 fields both publish (this plan first): length 38 ft 6 in vs 35 ft 10 in; dry weight 9,800 lb vs 8,220 lb; GVWR 12,995 lb vs 11,000 lb; cargo capacity 3,195 lb vs 2,780 lb; hitch weight 2,300 lb vs 1,380 lb; grey tank 32 gal vs 64 gal. They match on sleeps, fresh tank and black tank.
| Sportster plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 12,995 | 4 of 5 | 10,000–13,995 |
| Dry weight (lb) | 9,800 | 4 of 5 | 6,840–11,070 |
| Cargo capacity (lb) | 3,195 | 5 of 5 | 2,780–3,195 |
| Hitch weight (lb) | 2,300 | 4 of 5 | 980–2,640 |
| Length | 38 ft 6 in | 4 of 5 | 30 ft 8 in–40 ft 6 in |
| Grey tank (gal) | 32 | 1–2 of 5 | 32–64 |
| Black tank (gal) | 32 | 1–3 of 5 | 32–82 |
| Sleeps | 8 | 4–5 of 5 | 4–8 |
Either side of it by GVWR: Sportster 280TH is 1,495 lb lighter (11,500 lb GVWR); Sportster 353TH13 is 1,000 lb heavier (13,995 lb GVWR).
| Nearest Sportster siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Sportster 331TH13 | 38 ft 6 in | 8 | 9,800 | 12,995 | 3,195 | 2,300 | 75 |
| Sportster 301THR | 35 ft 10 in | 8 | 8,220 | 11,000 | 2,780 | 1,380 | 75 |
| Sportster 280TH | 32 ft 6 in | 7 | 8,310 | 11,500 | 3,190 | 1,680 | 75 |
| Sportster 353TH13 | 40 ft 6 in | 6 | 11,070 | 13,995 | 2,925 | 2,640 | 75 |
| Sportster 270THR | 30 ft 8 in | 4 | 6,840 | 10,000 | 3,160 | 980 | 75 |
All 5 Sportster floorplans: Sportster line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Sportster 331TH13 | 12,995 | 9,800 | 8 | 38 ft 6 in |
| Jay Flight 40FKDS | 13,000 | 10,510 | 4 | 41 ft 0 in |
| Momentum 23G | 13,000 | 7,669 | 6 | 28 ft 10 in |
| Arctic Fox Edge 27SX | 13,000 | 8,770 | 4 | 31 ft 2 in |
| Valor 27T14 | 13,000 | 8,336 | — | 31 ft 10 in |
| Vengeance Rogue 28L160 | 13,000 | 9,534 | — | 37 ft 11 in |
| Cherokee Timberwolf 39DL | 13,095 | 10,778 | — | 42 ft 8 in |
Against the Sportster 331TH13: the Jay Flight 40FKDS is 5 lb heavier and 2 ft longer and sleeps 4 fewer; the Momentum 23G is 5 lb heavier and 10 ft shorter and sleeps 2 fewer; the Arctic Fox Edge 27SX is 5 lb heavier and 7 ft shorter and sleeps 4 fewer.
08 Common questions about the Sportster 331TH13
How much does the Sportster 331TH13 weigh?
9,800 lb dry; 12,995 lb GVWR, the most it may weigh loaded.
How much can the Sportster 331TH13 carry?
3,195 lb, 25% of its GVWR (median across 1,416 travel trailers here: 23%). A full fresh tank uses 622 lb of it.
What is the pin weight of the Sportster 331TH13?
2,300 lb as published, 23% of the dry weight (median across 2,002 travel trailers here: 12%).
What size tow vehicle does the Sportster 331TH13 need?
A tow rating of at least 12,995 lb, plus payload for the loaded pin weight, passengers and cargo.
How many people does the Sportster 331TH13 sleep?
It is rated to sleep 8. No other Sportster floorplan here is rated for more.
What are the tank capacities on the Sportster 331TH13?
Fresh 75, grey 32, black 32 gallons. Off hookups, the waste tanks fill first.
How long is the Sportster 331TH13?
38' 6" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
13 of the 18 fields this catalogue tracks are published for the Sportster 331TH13. Not published: slide count, axle count, refrigerator, air conditioning, tire size (a description is published, a size is not).
Sourcing rules: methodology.
10 Manuals & documents
Sources: kz-rv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 9 recall campaigns and 6 owner complaints (model years 2005 on) against the Sportster line (a recall and a complaint are not the same thing).
Too few reports to show a pattern. 6 complaints have been filed on this line — not enough to say what fails most often. They cover tires, latches/locks/linkages, structure and suspension.
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Sportster line page.