New 2026 Jayco Seismic 399 Toy Hauler Fifth Wheel
Jayco Seismic toy hauler 399 highlights:
- Party Deck
- Queen Bed with Convertible Sofas
- Overhead Garage Loft with Storage
- Walk-in Shower
- 60" x 80" Queen Bed
- 4K Smart LED HDTV
The Jayco Seismic toy hauler 399 is the perfect combination of adventure-ready design and residential comfort, ideal for families and thrill-seekers alike. The 13' 6" rear garage features a queen bed with convertible sofas, providing flexible sleeping arrangements, plus an overhead loft with additional sleeping or storage space. A side man door ensures easy entry and exit, while the rear party deck with steps expands your outdoor living space, making it perfect for entertaining. Inside, dual opposing slides in the main living area create a spacious environment, complete with an L-shaped tri-fold sofa along the roadside and a dinette with refrigerator and pantry in the curbside slide. The 4K Smart LED HDTV adds entertainment for movie nights or game days.
Up front, the private master bedroom provides a luxurious retreat with a 60" x 80" queen bed in a third slide out, a walk-in closet, dresser, and washer/dryer prep for full-time convenience. The dual-entry bath accessible from both the hall and master bedroom includes a walk-in shower, vanity with sink, overhead storage, and a toilet. With ample interior storage, built-in cabinetry, and high-end finishes, everyone can enjoy the comforts of home while on the road.
Seismic toy haulers are engineered for durability and fun. This model features a custom automotive-grade vinyl exterior graphics package, a painted fiberglass front cap with built-in LED lighting, and 102" wide-body structural steel I-beam construction. Pass-through storage with Slam-Latch baggage doors simplifies loading, and the rear ramp door/patio with anti-slip, non-skid flooring makes unloading toys safe and easy. Additional exterior features include a three-season garage wall, a 30-gallon fuel tank with timer, marine-grade exterior speakers, and dual side awnings for extended outdoor enjoyment. The Climate Shield zero-degree tested weather protection, 35,000 BTU furnace, PEX plumbing, and fully enclosed, heated underbelly make year-round adventures possible, while interior amenities such as solid hardwood cabinet doors, residential vinyl flooring, night shades, and more elevate the overall experience.
At Joplin RV, we're a true RV Supercenter featuring the nation's most recognized and desirable brands- all in one place. From Jayco and Keystone to Brinkley and Forest River, we've got you covered. Conveniently located in Joplin, MO, with nationwide delivery. We take care of the details, so you can focus on planning your next adventure!
Thank you, Sharon, for the outstanding service at Summerland RV. Its people like you that makes all the difference in the RV Industry. I called you as a Winnebago Dealership, you listened to what I needed, ordered the parts, and did not give me the traditional run around. I truly appreciated the leadership, sincerity in you organizing everything for me to come in to have the parts installed in a timely - Wallace
You Save: $15,215
Sale Price: $108,995
Stock# NT8M0082
| Sleeps | 9 |
| Slides | 3 |
| Length | 45 ft 11 in |
| Ext Width | 8 ft 6 in |
| Ext Height | 13 ft 2 in |
| Int Height | 8 ft 3 in |
| Hitch Weight | 3370 lbs |
| GVWR | 20400 lbs |
| Dry Weight | 14950 lbs |
| Cargo Capacity | 5450 lbs |
| Fresh Water Capacity | 106 gals |
| Grey Water Capacity | 87 gals |
| Black Water Capacity | 87 gals |
| Tire Size | 17.5" |
| Furnace BTU | 35000 btu |
| Fuel Capacity | 30 gals |
| Number Of Bunks | 1 |
| Available Beds | Queen |
| Refrigerator Type | 12 Volt |
| Refrigerator Size | 17 cu ft |
| Cooktop Burners | 3 |
| Number of Awnings | 3 |
| Garage Size | 13 ft 6 in |
| LP Tank Capacity | 30 lbs |
| Water Heater Capacity | 16 gal |
| Water Heater Type | Gas/Electric DSI |
| AC BTU | 30000 btu |
| TV Info | LR 4K Smart LED HDTV |
| Awning Info | 21' Electric w/LED Lights, 11' Electric, 10' Rear |
| Axle Count | 3 |
| Washer/Dryer Available | Yes |
| Number of LP Tanks | 2 |
| Shower Type | Walk-In Shower |
| Electrical Service | 50 amp |
| VIN | 1UJCGSCV4T18M0082 |
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