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xlr-nitro 321 XLR Nitro Fifth Wheels

The XLR Nitro 321 features a front king bedroom with a walkaround bed and a wardrobe slide for clothes storage. The main bathroom provides a vanity sink with storage cubbies, medicine cabinet, residential shower with built-in seat, and commode. The main living area includes two slideouts for additional elbow room, well-appointed kitchen with residential appliances and a pantry, and a sofa slide that faces an angled entertainment center with TV and fireplace.
The 321 Toy Hauler Fifth Wheel features two off-door side slide outs and two entry doors. Interior layout from front to back: bedroom with king bed, wardrobes and night stands on either side, overhead cabinet and off-door side wardrobe slideout; off-door side bathroom; hallway and steps down to main living area and entry door; off-door side kitchen with peninsula sink, overhead cabinets, and an off-door side slideout with microwave, stove and refrigerator; door side slideout with sofa; off-door side pantry, and angled entertainment center with fireplace below; rear garage separated by a door features the second entry steps, off-door side half bathroom, gaucho couches, removeable tables and rear ramp patio deck

Hitch Weight:
2,585 lb.
12,234 lb.
4,351 lb.
Exterior Length:
37' 10"
Exterior Height:
13' 4"
Exterior Width:
Fresh Water:
102.00 gal.
Gray Water:
71.00 gal.
Black Water:
82.00 gal.
Awning Size:

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.

Actual towing capacity is dependent upon your particular loading and towing circumstances, which includes the GVWR, GAWR and GCWR as well as adequate trailer brakes. Please refer to the Operator's Manual of your vehicle for further towing information.

Note: Specifications are subject to change without notice.


All information contained on this website is believed to be accurate at the time of publication. However, during the model year, it may be necessary to make revisions and Forest River, Inc. reserves the right to make changes without notice, including prices, colors, materials, equipment and specifications as well as the addition of new models and the discontinuance of models shown on this website. Therefore, please consult with your Forest River, Inc. dealer and confirm the existence of any material, design or specifications that are material to your purchase decision.