New 2026 Jayco Seismic 399

Durability and versatility collide in Jayco Toy Haulers. With numerous models and floorplan options, there is no need to sacrifice comfort for garage space. We offer fifth wheel toy haulers and toy hauler trailers to meet your weight and towing preferences. At Jayco, we understand the meaning of adventure, and we know packing your toys is a part of that. Explore our lineup today and find the perfect Jayco Toy Hauler to elevate your next adventure!
The Seismic Toy Hauler has room for all your toys with its 102-inch wide-body design, and is equipped to get you wherever you want to go. Seismic has a standard ramp patio with rear steps, three-seasons room and a 5.5K generator, 17.5-inch Uniroyal "H" rated tires and 6-point hydraulic landing gear. The Seismic Toy Hauler is warrantied for full-time RV use with Jayco’s 2+3 warranty.
The Jayco Seismic 399 packs everything thrill-seekers need – and more!
Top Features:
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Party Deck with railing
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13'6" Garage with queen bed, convertible sofas & loft
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Spacious Living Area with L-shaped sofa & dinette
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Private Front Suite with queen bed slide, walk-in closet & washer/dryer prep
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Walk-In Shower & dual-entry bath
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4K Smart LED HDTV
Built tough with wide-body steel construction, painted fiberglass cap, and slam-latch storage. Unload toys easily with the non-slip ramp door/patio. Keep the fun going with marine-grade speakers and a 30-gallon fuel tank
2025 specs shown
I was very happy with RV City. Loved our sales rep. Wes and our finance team Jackie Beaupre and Kevin Moodie. - Irene
You Save: $43,716
RV City Price: $154,975
Stock# N8181
Exterior Color: Multi
Sleeps | 8 |
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 |
Exterior Color | Multi |
GVWR | 20400 lbs |
Dry Weight | 3370 lbs |
Cargo Capacity | 5450 lbs |
Fresh Water Capacity | 106 gals |
Grey Water Capacity | 87 gals |
Black Water Capacity | 87 gals |
Tire Size | 215/75R17.5H |
Furnace BTU | 35000 btu |
Generator | NPS - Powered by Yamaha |
Fuel Capacity | 30 gals |
Refrigerator Size | 17 cu ft |
Cooktop Burners | 3 |
Number of Awnings | 2 |
Garage Size | 13 ft 6 in |
LP Tank Capacity | 30 |
Water Heater Capacity | 16 gal |
Water Heater Type | On Demand Tankless hot water |
AC BTU | 13500 btu |
TV Info | 4K Smart LED HDTV |
Awning Info | 21' front 11" rear |
Axle Count | 3 |
Washer/Dryer Available | Yes |
Number of LP Tanks | 2 |
Shower Type | Walk-In Shower |
Electrical Service | 50 amp |
VIN | 1UJCGSCV5T18M0091 |
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More than 50 years and still fun!
Peace and love were in the air—and so was entrepreneurial spirit. In 1968, Lloyd and Bertha Bontrager set out to make a family dream a reality in their quiet corner of Northern Indiana. Let the fun begin!
In the '70s, while families gathered around the newfangled video boxes (TVs of course!), we began to make a name for ourselves too, acquiring competitors, delivering new products and selling internationally for the first time. Look out, TVs! We’ve got an idea for family time too.
Jayco was established among the powers of the RV industry in the '80s and we mourned the loss of our fearless leader, Lloyd, in a tragic plan crash. That did not stop the momentum, but instead we doubled down on the vision for family fun.
In the '90s Jayco acquired Starcraft, one of the oldest and most respected builders of campers. Lloyd was inducted into the RV Hall of Fame. We built and shipped our 300,000 unit in 1997, and our new corporate headquarters facility was completed in Middlebury, Indiana.
In 2002, Jayco introduced the Jay Flight travel trailers which as of today, has been the #1 selling travel trailers in North America for thirteen years straight. In 2006, we built and shipped our 500,000th unit, and introduced the first lightweight toy hauler travel trailer built with a wider stance, known first as the Talon. And, in 2008, we acquired assets of the former Travel Supreme and launched the Class A diesel-pusher Entegra Coach division.
Between four division of Jayco, Starcaft RV, Entegra Coach and Highland Ridge RV in May of 2016, we built and celebrated our 1,000,000the unit in total. On July 1st of the same year, Jayco Corporation, including all of the brands of Jayco, Starcraft RV, Entegra Coach, and Highland Ridge RV, was acquired by Thor Industries.
Fast forward to the '20s, a global pandemic reawakened everyone's desire to get outside and sparked another golden age for the RVing community. With eyes toward a bright future, Jayco, Entegra Coach, Highland Ridge and Starcraft unified as the Jayco Family of Companies.
Any price listed excludes GST. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @ 1-888-438-8588 for availability as our inventory changes rapidly.