01 What makes it unique
KZ lists the 2009 Inferno SST FSL29 at 7,860 lb dry, a GVWR of 12,000 lb, a net carrying capacity of 4,140 lb and a hitch weight of 980 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
KZ prints no tank capacity for it.
Among the 4 Inferno SST floorplans KZ’s Inferno SST brochure (filed in KZ’s 2009 brochure folder; the brochure prints no year) lists with a published dry weight, it is number 4 from the lightest, in a range from 5,390 lb (Inferno SST FKL19) to 7,860 lb (Inferno SST FSL29). 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 Inferno SST brochure (filed in KZ’s 2009 brochure folder; the brochure prints no year); model year 2009 comes from where the maker files it on its own site, not from the document’s text.
How the FSL29 differs from the other three Inferno SST floorplans. Most distinctive first. How these ranks are worked out.
- Dry weight, 7,860 lb: heaviest of four; next is the FSL25 (6,660 lb).
- GVWR, 12,000 lb: highest of four; next are the FBL24, FKL19 and FSL25 (10,400 lb).
- Cargo capacity as a share of GVWR, 34.5%: smallest of four; next is the FSL25 (36%).
- Cargo capacity, 4,140 lb: second-smallest of four, between the FSL25 (3,740 lb) and the FBL24 (4,410 lb).
Next to the FSL25, the nearest lighter floorplan by dry weight, the FSL29 is 1,200 lb heavier by dry weight, has a GVWR 1,600 lb higher and has 400 lb more cargo capacity.
02 Full specifications
Dimensions
- Exterior length
- Not published by KZ
- Exterior height
- Not published by KZ
- Exterior width
- Not published by KZ
- Interior height
- Not published by KZ
Weights
- Dry / unit base weight (UVW)
- 7,860 lb
- GVWR (max loaded)
- 12,000 lb
- Net cargo / payload (CCC)
- 4,140 lb
- Hitch weight
- 980 lb
Capacities
- Fresh water
- Not published by KZ
- Grey water
- Not published by KZ
- Black water
- Not published by KZ
Running gear
- Hitch type
- Not stated per floorplan by KZ
- Tire size
- Not published by KZ
Sleeping & layout
- Sleeps
- Not published by KZ
- Model year source
- KZ brochure archive: link "Inferno SST" under heading "2009", file /brochures/2009/; brochure text prints no model year
- Axle Weight
- 6,880
- Axles
- (2) 6,000
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
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
03 The Inferno SST floorplan family
KZ’s Inferno SST brochure (filed in KZ’s 2009 brochure folder; the brochure prints no year) lists 4 Inferno SST floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Inferno SST FKL19 | — | — | Profiled |
| Inferno SST FBL24 | — | — | Profiled |
| Inferno SST FSL25 | — | — | Profiled |
| Inferno SST FSL29 | — | — | Profiled |
KZ’s Inferno SST brochure (filed in KZ’s 2009 brochure folder; the brochure prints no year) lists 4 Inferno SST floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What KZ does not publish for the Inferno SST FSL29
KZ prints no tire size, interior height, grey-tank, black-tank, sleeping capacity for this model, so none is given. 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
6,660 lb dry and 10,400 lb GVWR, against this model’s 7,860 lb and 12,000 lb.
06 Loading it for a trip
Cargo capacity on the Inferno SST FSL29 is 4,140 lb.
No source publishes a tongue weight for the Inferno SST FSL29, so its hitch load has to come from a scale ticket taken with the trailer hitched.
07 Where this floorplan sits
Closest sibling: the Inferno SST FSL25, nearest on the published figures. It differs on 3 of the 3 fields both publish (this plan first): dry weight 7,860 lb vs 6,660 lb; GVWR 12,000 lb vs 10,400 lb; cargo capacity 4,140 lb vs 3,740 lb.
| Inferno SST plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 12,000 | 4 of 4 | 10,400–12,000 |
| Dry weight (lb) | 7,860 | 4 of 4 | 5,390–7,860 |
| Cargo capacity (lb) | 4,140 | 2 of 4 | 3,740–5,010 |
Either side of it by GVWR: Inferno SST FSL25 is 1,600 lb lighter (10,400 lb GVWR).
| Nearest Inferno SST siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Inferno SST FSL29 | — | — | 7,860 | 12,000 | 4,140 | — | — |
| Inferno SST FSL25 | — | — | 6,660 | 10,400 | 3,740 | — | — |
| Inferno SST FBL24 | — | — | 5,990 | 10,400 | 4,410 | — | — |
| Inferno SST FKL19 | — | — | 5,390 | 10,400 | 5,010 | — | — |
All 4 Inferno SST floorplans: Inferno SST line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Inferno SST FSL29 | 12,000 | 7,860 | — | — |
| Jay Flight 401FLTS | 12,000 | 10,355 | 4 | 40 ft 4 in |
| Momentum 30MAV | 12,000 | 8,400 | 6 | 36 ft 11 in |
| Desert Fox 23T16 | 12,000 | 8,895 | 4 | 30 ft 2 in |
| Puma Vista 39DBT | 12,000 | 10,162 | — | 42 ft 4 in |
| Sportster X 22X | 12,000 | 7,940 | 6 | 28 ft 5 in |
| Spyder 28SC | 12,000 | 8,860 | — | 34 ft 11 in |
08 Common questions about the Inferno SST FSL29
How much does the Inferno SST FSL29 weigh?
7,860 lb dry; 12,000 lb GVWR, the most it may weigh loaded.
How much can the Inferno SST FSL29 carry?
4,140 lb, 34% of its GVWR (median across 1,416 travel trailers here: 23%).
What size tow vehicle does the Inferno SST FSL29 need?
A tow rating of at least 12,000 lb, plus payload for the loaded tongue weight, passengers and cargo.
From the figures above.
09 What this page publishes, and what it does not
4 of the 18 fields this catalogue tracks are published for the Inferno SST FSL29. Not published: hitch weight, exterior length, exterior height, exterior width, interior height, fresh tank, grey tank, black tank, sleeps, slide count, tire specification, awning, refrigerator, air conditioning.
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 1 recall campaign against the Inferno SST line (a recall and a complaint are not the same thing).
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 Inferno SST line page.