01 What makes it unique
Alliance RV’s 2026 Paradigm brochure prints a dry weight of 14,908 lb and a GVWR of 18,000 lb for the 370FB, with a pin weight of 2,664 lb. The brochure prints no cargo carrying capacity, so none is shown here, and none is worked out by subtracting one published figure from the other. The trailer’s own federal weight label, inside the door, carries its cargo capacity as built.
Alliance lists it under Paradigm fifth wheels in that brochure, at 40' 4" long, with 98 gal fresh, 106 gal grey and 106 gal black tanks. Fresh water weighs about 8.3 lb per US gallon, so a full fresh tank adds roughly 813 lb before anything else is loaded.
Among the 9 Paradigm floorplans whose dry weight Alliance’s 2026 brochure prints, it is number 5 by dry weight, in a range from 13,193 lb to 15,636 lb. Every figure in that comparison comes from the same brochure, for the same model year.
Every number on this page is read from Alliance RV’s 2026 Paradigm brochure (marked “New for 2026”, print date 19 September 2025). Alliance does not print exterior height or width, sleeping capacity or tire size against this floorplan there, so those rows read as not published.
How the 370FB differs from the other eight Paradigm floorplans. Most distinctive first. How these ranks are worked out.
- Pin weight as a share of dry weight, 17.9%: second-smallest of nine, between the 375RD (13.3%) and the 385FL (18.9%).
- Pin weight, 2,664 lb: third-lightest of nine, between the 295MK (2,568 lb) and the 310RL (2,674 lb).
- Length, 40 ft 4 in: fourth-shortest of nine, between the 340RL (37 ft 10 in) and the 388SP (40 ft 11 in).
- Dry weight, 14,908 lb: fifth-lightest of nine, between the 382RK (14,812 lb) and the 395DS (15,278 lb).
- Black tank, 106 gal: largest of nine, level with the 382RK and 395DS; next are the 295MK, 310RL and four others (53 gal).
- GVWR, 18,000 lb: shared with the 375RD, 382RK and 395DS; of nine, three lower and two higher, nearest the 340RL (16,500 lb) and the 385FL and 388SP (19,000 lb).
Next to the 382RK, the nearest lighter floorplan by dry weight, the 370FB is 96 lb heavier by dry weight, has a pin weight 371 lb lighter and is 1 ft 2 in shorter; the two publish the same GVWR, fresh tank, grey tank and black tank.
Next to the 395DS, the nearest heavier floorplan by dry weight, the 370FB is 370 lb lighter by dry weight, has a pin weight 515 lb lighter, is 2 ft 2 in shorter and has a grey tank 53 gal smaller; the two publish the same GVWR, fresh tank and black tank.
02 Full specifications
Dimensions
- Exterior length
- 40' 4"
- Exterior height
- Not published by Alliance RV
- Exterior width
- Not published by Alliance RV
Weights
- Dry / unit base weight (UVW)
- 14,908 lb
- GVWR (max loaded)
- 18,000 lb
- Net cargo / payload (CCC)
- Not published by Alliance RV
- Hitch / pin weight
- 2,664 lb
Capacities
- Fresh water
- 98 gal
- Grey water
- 106 gal
- Black water
- 106 gal
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- Not published by Alliance RV
Sleeping & layout
- Sleeps
- Not published by Alliance RV
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.
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 (18,000 lb) and the upper loaded pin estimate (4,500 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).
03 The Paradigm floorplan family
Alliance RV’s 2026 Paradigm brochure lists 10 floorplans; this site profiles every one whose dry weight it prints. The brochure prints dry weight, GVWR, hitch weight, length and tanks, and no cargo carrying capacity.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| 295MK | 33' 3" | — | Profiled |
| 310RL | 34' 11" | — | Profiled |
| 340RL | 37' 10" | — | Profiled |
| 382RK | 41' 6" | — | Profiled |
| 370FB | 40' 4" | — | Profiled |
| 395DS | 42' 6" | — | Profiled |
| 375RD | 41' 9" | — | Profiled |
| 388SP | 40' 11" | — | Profiled |
| 385FL | 41' 4" | — | Profiled |
| 312RK | 34' 11" | — | Catalogued · brochure gives no dry weight or hitch weight or GVWR |
Alliance’s 2026 Paradigm brochure lists 10 floorplans. Each with a printed dry weight has a page here; the rest are catalogued with the reason against each.
04 Notes on this floorplan
What Alliance RV does not publish for the 370FB
No cargo carrying capacity, exterior height or width, sleeping capacity or tire size is printed against this floorplan in Alliance’s 2026 brochure, so those rows read as not published. Nothing is filled from a sibling floorplan, 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
14,812 lb dry and 18,000 lb GVWR, against this plan’s 14,908 lb and 18,000 lb.
15,278 lb dry and 18,000 lb GVWR, against this plan’s 14,908 lb and 18,000 lb.
07 Where this floorplan sits
Closest sibling: the Paradigm 382RK, nearest on the published figures. It differs on 3 of the 7 fields both publish (this plan first): length 40 ft 4 in vs 41 ft 6 in; dry weight 14,908 lb vs 14,812 lb; hitch weight 2,664 lb vs 3,035 lb. They match on GVWR, fresh tank, grey tank and black tank.
| Paradigm plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 18,000 | 4–7 of 9 | 16,000–19,000 |
| Dry weight (lb) | 14,908 | 5 of 9 | 13,193–15,636 |
| Hitch weight (lb) | 2,664 | 3 of 9 | 2,032–3,179 |
| Length | 40 ft 4 in | 4 of 9 | 33 ft 3 in–42 ft 6 in |
| Grey tank (gal) | 106 | 1–8 of 9 | 106–159 |
| Black tank (gal) | 106 | 7–9 of 9 | 53–106 |
Either side of it by GVWR: Paradigm 340RL is 1,500 lb lighter (16,500 lb GVWR); Paradigm 375RD matches it at 18,000 lb GVWR.
| Nearest Paradigm siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Paradigm 370FB | 40 ft 4 in | — | 14,908 | 18,000 | — | 2,664 | 98 |
| Paradigm 382RK | 41 ft 6 in | — | 14,812 | 18,000 | — | 3,035 | 98 |
| Paradigm 395DS | 42 ft 6 in | — | 15,278 | 18,000 | — | 3,179 | 98 |
| Paradigm 340RL | 37 ft 10 in | — | 14,072 | 16,500 | — | 2,706 | 98 |
| Paradigm 385FL | 41 ft 4 in | — | 15,636 | 19,000 | — | 2,952 | 98 |
| Paradigm 388SP | 40 ft 11 in | — | 15,528 | 19,000 | — | 3,112 | 98 |
All 9 Paradigm floorplans: Paradigm line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 370FB | 18,000 | 14,908 | — | 40 ft 4 in |
| Cedar Creek 381MUD | 18,000 | 15,429 | 8 | 43 ft 5 in |
| Influence 2903RL | 18,000 | 12,100 | — | — |
| Momentum 325G | 18,000 | 12,603 | 6 | — |
| North Point 383FLRB | 18,000 | 14,840 | 6 | — |
| Puma Grand Mesa 395FKL | 18,000 | 14,929 | — | 42 ft 7 in |
| Valor 36V11 | 18,000 | 14,281 | — | 39 ft 7 in |
Against the 370FB: the Cedar Creek 381MUD is 3 ft longer.
08 Common questions about the 370FB
How much does the 370FB weigh?
14,908 lb dry; 18,000 lb GVWR, the most it may weigh loaded.
What is the pin weight of the 370FB?
2,664 lb as published, 18% of the dry weight (median across 540 fifth wheels here: 19%).
What size tow vehicle does the 370FB need?
A tow rating of at least 18,000 lb, plus payload for the loaded pin weight, passengers and cargo.
What are the tank capacities on the 370FB?
Fresh 98, grey 106, black 106 gallons. Off hookups, fresh water runs out first.
How long is the 370FB?
40' 4" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
7 of the 18 fields this catalogue tracks are published for the 370FB. Not published: cargo capacity (CCC), exterior height, exterior width, interior height, sleeps, slide count, axle count, tire specification, awning, refrigerator, air conditioning.
Sourcing rules: methodology.
10 Manuals & documents
Sources: alliancerv.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 13 owner complaints (model years 2005 on) against the Paradigm line (a recall and a complaint are not the same thing).
What to look at on a used one. Across the 13 complaints filed on this line the most-reported components are equipment (23%), structure (23%) and wheels (23%).
Reports that name the 370FB
3 of those records name this floorplan specifically rather than the line as a whole.
| Type | Date | Reference | What it says |
|---|---|---|---|
| Recall | 22 Apr 2022 | 22V270000 | A gas leak in the presence of an ignition source can increase the risk of a fire. |
| Recall | 12 Sep 2024 | 24V675000 | Brakes that fail to engage when a tow vehicle detaches increases the risk of a crash. |
| Recall | 10 Aug 2023 | 23V569000 | Incorrect wiring may prevent the emergency trailer brake from engaging when the trailer becomes detached, increasing the risk of a crash. |
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 Paradigm line page.