01 What makes it unique
Prime Time lists the 2022 Sanibel 3902 WB at 13,114 lb dry, a net carrying capacity of 2,316 lb and a pin weight of 2,430 lb. It prints no GVWR for it.
It is 43' 8" long and 13' 1" high. Prime Time prints its tanks as 54 gal fresh, 73 gal grey, 34 gal black.
Among the 5 Sanibel floorplans Prime Time’s 2022 Sanibel brochure lists with a published dry weight, it is number 5 from the lightest, in a range from 11,058 lb (Sanibel 3102 RSWB) to 13,114 lb (Sanibel 3902 WB). Every figure in that comparison is Prime Time’s, for the same model year.
Every number on this page was read on 6 Nov 2026 from Prime Time’s 2022 Sanibel brochure, the maker’s own dated document for model year 2022.
How the Sanibel 3902 WB differs from the other four Sanibel floorplans. Most distinctive first. How these ranks are worked out.
- Dry weight, 13,114 lb: heaviest of five; next is the Sanibel 3602 WB (13,097 lb).
- Cargo capacity, 2,316 lb: smallest of five; next is the Sanibel 3602 WB (2,344 lb).
- Black tank, 34 gal: smallest of five; next are the RSWB and Sanibel 3702 WB (39 gal).
- Pin weight, 2,430 lb: second-heaviest of five, between the Sanibel 3702 WB (2,298 lb) and the Sanibel 3802 WB (2,487 lb).
- Length, 43 ft 8 in: second-longest of five, between the Sanibel 3702 WB (41 ft 3 in) and the Sanibel 3602 WB (44 ft 6 in).
- Pin weight as a share of dry weight, 18.5%: third-smallest of five, between the Sanibel 3602 WB (16.8%) and the Sanibel 3702 WB and Sanibel 3802 WB (19.4%).
Next to the Sanibel 3602 WB, the nearest lighter floorplan by dry weight, the Sanibel 3902 WB is 17 lb heavier by dry weight, has 28 lb less cargo capacity, has a pin weight 236 lb heavier, is 10 in shorter, stands 2 in lower and has a black tank 44 gal smaller; the two publish the same fresh tank and grey tank.
02 Full specifications
Dimensions
- Exterior length
- 43' 8"
- Exterior height
- 13' 1"
- Exterior width
- Not published by Prime Time
- Interior height
- Not published by Prime Time
Weights
- Dry / unit base weight (UVW)
- 13,114 lb
- GVWR (max loaded)
- Not published by Prime Time
- Net cargo / payload (CCC)
- 2,316 lb
- Hitch / pin weight
- 2,430 lb
Capacities
- Fresh water
- 54 gal
- Grey water
- 73 gal
- Black water
- 34 gal
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- Not published by Prime Time
Sleeping & layout
- Sleeps
- Not published by Prime Time
- Model year source
- Printed on the cover (page 1): "2022 FIFTH WHEELS" (printed as artwork; the PDF text layer does not carry it). Copyright line reads "©2019 Prime Time Manufacturing" and is not used.
- Weight basis (as printed)
- Spec table "SANIBEL - FLOORPLANS", page 5. The brochure prints UVW and CCC but no GVWR in the table.
- Text-layer note
- Page 5 text layer also holds an overlapping hidden table (codes such as 3402) that does not render; figures here are read from the rendered page only.
How these published figures sit against the rest of the catalogue: fifth wheel pin weight and payload; fresh, grey and black tank sizes; camper trailer size chart.
Drawn to scale
Size (no width published)
Holding tanks
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
03 The Sanibel floorplan family
Prime Time’s 2022 Sanibel brochure lists 5 Sanibel floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Sanibel 3102 RSWB | 36'6" | — | Profiled |
| Sanibel 3702 WB | 41'3" | — | Profiled |
| Sanibel 3802 WB | 41' 1" | — | Profiled |
| Sanibel 3602 WB | 44' 6" | — | Profiled |
| Sanibel 3902 WB | 43' 8" | — | Profiled |
Prime Time’s 2022 Sanibel brochure lists 5 Sanibel floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What Prime Time does not publish for the Sanibel 3902 WB
Prime Time prints no GVWR, tire size, interior height, 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
13,097 lb dry and Not published by Prime Time GVWR, against this model’s 13,114 lb and Not published by Prime Time.
06 Loading it for a trip
A full 54-gallon fresh tank is about 448 lb of water, 19% of the Sanibel 3902 WB’s 2,316 lb cargo capacity, leaving 1,868 lb. Across 5 Sanibel floorplans the water share runs 16% to 19%, and this plan’s is the highest. Nearest on that share: Sanibel 3602 WB at 19%.
07 Where this floorplan sits
Closest sibling: the Sanibel 3702 WB, nearest on the published figures. It differs on 5 of the 7 fields both publish (this plan first): length 43 ft 8 in vs 41 ft 3 in; dry weight 13,114 lb vs 11,859 lb; cargo capacity 2,316 lb vs 2,439 lb; hitch weight 2,430 lb vs 2,298 lb; black tank 34 gal vs 39 gal. They match on fresh tank and grey tank.
| Sanibel plans | This plan | Position, low to high | Range |
|---|---|---|---|
| Dry weight (lb) | 13,114 | 5 of 5 | 11,058–13,114 |
| Cargo capacity (lb) | 2,316 | 1 of 5 | 2,316–2,760 |
| Hitch weight (lb) | 2,430 | 4 of 5 | 1,817–2,487 |
| Length | 43 ft 8 in | 4 of 5 | 36 ft 6 in–44 ft 6 in |
| Grey tank (gal) | 73 | 1–4 of 5 | 73–78 |
| Black tank (gal) | 34 | 1 of 5 | 34–78 |
Either side of it by dry weight: Sanibel 3602 WB is 17 lb lighter (13,097 lb dry).
| Nearest Sanibel siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Sanibel 3902 WB | 43 ft 8 in | — | 13,114 | — | 2,316 | 2,430 | 54 |
| Sanibel 3702 WB | 41 ft 3 in | — | 11,859 | — | 2,439 | 2,298 | 54 |
| Sanibel 3602 WB | 44 ft 6 in | — | 13,097 | — | 2,344 | 2,194 | 54 |
| Sanibel 3802 WB | 41 ft 1 in | — | 12,841 | — | 2,659 | 2,487 | 54 |
| Sanibel 3102 RSWB | 36 ft 6 in | — | 11,058 | — | 2,760 | 1,817 | 54 |
All 5 Sanibel floorplans: Sanibel line hub.
| Other lines, nearest by dry weight | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Sanibel 3902 WB | — | 13,114 | — | 43 ft 8 in |
| Crusader 382MBH | — | 13,106 | — | 43 ft 5 in |
| Sandstorm 3217GX | 17,160 | 13,124 | — | 38 ft 4 in |
| XLR Nitro 32W17 | — | 13,124 | — | 38 ft 4 in |
| Roamer 35MRQS | 15,400 | 13,125 | 8 | 42 ft 1 in |
| Model Z 3300 | 16,995 | 13,127 | — | 36 ft 7 in |
| Momentum 320G | 16,400 | 13,100 | 6 | — |
Against the Sanibel 3902 WB: the Crusader 382MBH is 8 lb lighter; the Sandstorm 3217GX is 10 lb heavier and 5 ft shorter; the XLR Nitro 32W17 is 10 lb heavier and 5 ft shorter.
08 Common questions about the Sanibel 3902 WB
How much can the Sanibel 3902 WB carry?
2,316 lb. A full fresh tank uses 448 lb of it.
What is the pin weight of the Sanibel 3902 WB?
2,430 lb as published, 19% of the dry weight (median across 686 fifth wheels here: 19%).
What are the tank capacities on the Sanibel 3902 WB?
Fresh 54, grey 73, black 34 gallons. Off hookups, fresh water runs out first.
How long is the Sanibel 3902 WB?
43' 8" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
8 of the 18 fields this catalogue tracks are published for the Sanibel 3902 WB. Not published: GVWR, exterior width, interior height, sleeps, slide count, axle count, tire specification, awning, refrigerator, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: forestriverinc.com, library.rvusa.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 10 recall campaigns and 1 owner complaint (model years 2005 on) against the Sanibel line (a recall and a complaint are not the same thing).
Too few reports to show a pattern. 1 complaint has been filed on this line — not enough to say what fails most often. It covers tires.
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 Sanibel line page.