2026 Forest River No Boundaries 18.3 BEAST MODE | Camper Trailer

The NB18.3 is a rear bath travel trailer that blends comfort and versatility in a compact, easy-to-tow design. Its slide-out sofa opens the living space for relaxing or entertaining, while the front queen bed offers a cozy place to unwind. The spacious rear bath provides full facilities and added privacy, and the well-equipped indoor and outdoor kitchens make cooking simple. Lightweight yet full-featured, the NB18.3 delivers big adventure in a small package.

Specifications

Hitch Weight – 545 lb.

GVWR – 5,603 lb.

UVW – 4,103 lb.

CCC – 1,500 lb.

Exterior Length – 20′ 6″

Exterior Height – 10′ 10″

Exterior Width – 96″

Fresh Water – 40 gal.

Gray Water – 40 gal.

Black Water – 30 gal.

Awning Size – 13′

Specifications Definitions

GVWR (Gross Vehicle Weight Rating)

is the maximum permissible weight of the unit when fully loaded. It includes all weights, inclusive of all fluids, cargo, optional equipment and accessories. For safety and product performance do NOT exceed the GVWR.

GAWR (Gross Axle Weight Rating) – is the maximum permissible weight, including cargo, fluids, optional equipment and accessories that can be safely supported by a combination of all axles.

UVW (Unloaded Vehicle Weight)*– is the typical weight of the unit as manufactured at the factory. It includes all weight at the unit’s axle(s) and tongue or pin and LP Gas. The UVW does not include cargo, fresh potable water, additional optional equipment or dealer installed accessories.

*Estimated Average based on standard build optional equipment.

CCC (Cargo Carrying Capacity)** – is the amount of weight available for fresh potable water, cargo, additional optional equipment and accessories. CCC is equal to GVWR minus UVW. Available CCC should accommodate fresh potable water (8.3 lbs per gallon). Before filling the fresh water tank, empty the black and gray tanks to provide for more cargo capacity.

**Estimated Average based on standard build optional equipment.

Each Forest River RV is weighed at the manufacturing facility prior to shipping. A label identifying the unloaded vehicle weight of the actual unit and the cargo carrying capacity is applied to every Forest River RV prior to leaving our facilities.

The load capacity of your unit is designated by weight, not by volume, so you cannot necessarily use all available space when loading your unit.

NB18.3 Floorplan Features & Options

C-Series Package (Mandatory Package)

1. Extended Season Ready
2. Aluminum Framed Floor w/ Block Foam Insulation
3. Sealed Underbelly w/ Forced Heat & Radiant Foil Barrier
4. 12V Tank Heaters
5. Fiberglass Front Cap w/ LED Lighting
6. All Terrain Tires w/ TPMS
7. 200 Watt Solar Panel & 30 Amp Controller
8. Solar Inverter Prep
9. 15K BTU A/C
10. Central Vac System
11. 12V Refrigerator
12. Upgraded Slow Close Shower Door (Select Models)
13. Surf(X)® Seamless Countertops
14. Air Fryer Microwave
15. Upgraded Dinette Pedestal Leg (Select Models)
16. Large Kitchen Sink w/ Cup Washer
17. Blue Tooth Audio w/ Marine Grade Speakers
18. Solid Entry Step(s)
19. Outdoor Kitchen
20. Tankless Water Heater
21. Hot & Cold Exterior Spray Port
22. Power Tongue Jack
23. Slam Latch Baggage Doors
24. Electric Awning w/ LED Light Strip
25. Black Glass Friction Hinge Entry Door(s)
26. Roof Ladder Prep
27. Rear Camera Prep
28. Battery Disconnect
29. Interior & Exterior Motion Lighting
30. Interior & Exterior USB-C Ports
31. 2″ Rear Accessory Hitch (Select Models)
32. Superior Laminated Construction Featuring Azdel Composite Panels

Beast Mode Package (Optional Package)

1. Beast Mode Independent Suspension
2. Additional 200 Watt Solar Panel (400 Watts Total)
3. 2000 Watt Inverter w/ Controller
4. Fresh Water Filter
5. Maxxair Vent Cover