Seismic

2026 Seismic

Starting at $112,905

The 2026 Jayco Seismic Toy Hauler is built for adventure, offering rugged durability and high-end comfort for all-season camping. With Climate Shield™ zero-degree tested weather protection, a 35,000 BTU furnace, and double-layer fiberglass batt insulation, you’ll stay comfortable in any climate. The fully enclosed and heated underbelly ensures peace of mind even in freezing conditions.

Built on a 102 in. wide structural steel I-beam frame, the Seismic features Stronghold VBL™ aluminum-framed walls, a Magnum Truss™ Roof System, and an Alpha roof membrane with a limited lifetime warranty. Reaching your destination is effortless with the 5-Star Handling Package, which includes Dexter® Axles with ABS and Tow Assist, 17.5 in., 16-ply "H" rated Cooper tires, and the MorRyde CRE 3000 Suspension System for a smooth, controlled ride.

Power is never an issue with the NPS-powered Yamaha 6,000W generator and the Overlander II Solar Package featuring two roof-mounted 200W solar panels, 30AMP Digital PWM Solar Controller, and an 1800W inverter. Inside, residential-style luxury awaits with an Olympic 66” x 80” bed, handcrafted hardwood cabinetry, and a SuperSofa or theater seats with heat, massage, and LED lighting (select models). The kitchen boasts a residential refrigerator, 30-inch space-saver microwave, and a residential 21-inch oven.

The garage is built for versatility, featuring HappiJac® electric-lift queen beds/convertible sofas, a Tuff-ply rubberized floor liner, and three-seasons removable wall/doors. Outdoor living is maximized with a rear ramp patio kit, anti-slip flooring, and a rear electric patio awning. Select models also offer an outside HALO griddle with JayPort® LP quick-connect.

Tech-savvy conveniences include a 4K Smart LED HDTV, touch-screen Bluetooth® stereo, and a Keyed-Alike™ lock system. With a blend of durability, luxury, and cutting-edge technology, the 2026 Jayco Seismic Toy Hauler is ready for your next great adventure.

Seismic 399 interior
Seismic 399 living area
Seismic 399 kitchen
Seismic 399 bedroom
Seismic 399 bathroom MORE PHOTOS
Seismic 399 garage seating
Seismic 399 garage
Seismic Metallic Copper full-body paint
Seismic Metallic Blue full-body paint
Seismic Titanium full-body paint
Seismic Charcoal full-body paint
Seismic party deck with stairs
Seismic party deck with stairs
Seismic party deck with stairs
Seismic party deck with stairs
Seismic

Seismic Floorplans and Prices

Starting at $112,905
Sleeps up to 8
Length 41' 9" - 46' 1"
Weight 13,405 - 15,210 lbs.

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Standard Features and Options

Standard Exterior Equipment

  • 102 in. wide-body structural steel I-beam construction
  • Stronghold VBL™ aluminum-framed and vacuum-bond laminated gel-coated fiberglass exterior walls and slide room end walls
  • Magnum Truss™ XL6™ Roof System (strongest tested roof in the industry) with Alpha roof membrane system (limited lifetime warranty)
  • Painted fiberglass front cap with clear coat and built-in specialty LED lighting
  • Custom automotive-grade vinyl exterior graphics package
  • Climate Shield™ zero-degree tested weather protection includes:
    • 35K BTU output furnace
    • Double-layer fiberglass batt insulation in ceiling and floor
    • Double-sided radiant barrier insulation (roof and floor)
    • Fully enclosed and heated underbelly (ducted)
  • NPS – Powered by Yamaha® 6,000-watt generator with built-in pure sine inverter (gas/C.A.R.B. certified)
  • 6-point hydraulic auto-leveling system
  • Battery disconnect switch
  • Detachable shore power cord
  • Dual 30 lb. propane bottles with auto regulator
  • Water heater bypass
  • LP quick-connect
  • Exterior marine-grade speakers
  • Digital TV antenna
  • Folding roof ladder
  • LED exterior lighting package
  • JaySMART™ (Safety Markers And Reverse Travel) LED lighting (patented)
  • HELIX Cooling System™ (industry exclusive) includes:
    • Three exterior-mounted 13,500 BTU soft-start, high-efficiency, ducted A/Cs (living room and bedroom)
    • Directional and closeable A/C vents
    • Insulated dual-duct design
  • Pass-through storage with Slam-latch™ baggage doors
  • Under-mounted spare tire
  • Fully enclosed, LED-lighted universal docking center with:
    • Black tank flush
    • Winterization and sanitation hookups
    • Quick-connect outside shower
    • Satellite prep

Standard Interior Equipment

  • Olympic king bed (359 & 413)
  • Residential quilted bedspread
  • Gas-strutted under-bed storage
  • Washer/dryer prep
  • 12V charging station
  • Bathroom skylight
  • Central command center with built-in tank monitoring
  • Custom interior design (Dune Gray)
  • LED interior lighting throughout
  • LED fireplace with electric space heater (select models)
  • No in-floor heat registers throughout the coach
  • Vinyl flooring in slideouts (no carpet)
  • Residential vinyl flooring (made in the USA)
  • Hardwood safety handrail on hallway steps
  • Carbon monoxide and LP detector
  • 5/8 in. tongue-and-groove joined plywood main floor decking and 3/8 in. tongue-and-groove plywood roof decking
  • Handcrafted and glazed doors, drawers, and trim
  • Solid hardwood cabinet doors
  • Residential finished dovetail-jointed drawers throughout
  • Heavy-duty, 75 lb., full-extension, steel ball-bearing drawer guides
  • SuperSofa™ or theater seats with heat, massage, and LED lighting (select models)
  • Stain-protected fabric on all furniture
  • Residential “Do it all” sink with pull-out kitchen faucet, glass rinse, and vegetable rinse
  • Porcelain foot-flush toilet
  • Inverter pre-wire

 

Customer Value Package (Mandatory)

  • On-demand tankless hot water heater
  • 50-amp service
  • Overlander II Solar Package: 30-amp solar controller with (2) roof-mounted 200W solar panels and a 1,800W inverter
  • 17 cu. ft. 12V refrigerator
  • 30 in. space-saver microwave
  • Residential 21 in. oven with three burners
  • 4K Smart LED HDTV with fully digital HDMI® output
  • Touch-screen Bluetooth® stereo with four speakers
  • Electric patio awning with integrated RGB LED lights (multi-color with remote control)
  • MORryde® strut-assisted fold-away entrance steps (main entrance)
  • Custom black, machined aluminum rims
  • SpartanLync™ Tire Pressure Monitoring System (TPMS)
  • Keyed-Alike™ lock system
  • Bathroom power vent
  • Night roller shades
  • Hidden hinges and magnet door catches on cabinet doors

5 Star Handling Package (Mandatory)

  • 17.5 in., 16-ply “H” rated Cooper® tires
  • Dexter® axles with ABS and Tow Assist – includes Nev-R-Adjust® brakes and E-Z Lube® hubs
  • MORryde® CRE-3000™ Suspension System
  • Rota-Flex® king pin
  • Wet bolt fasteners, bronze bushings, and 4K lb. leaf springs
  • 2nd electric patio awning with integrated RGB LED lights (multi-color with remote control)

Ramp and Cargo Equipment

  • 30 gal. fuel tank with timer
  • Garage D-rings mounted to steel frame
  • HappiJac® electric-lift queen beds/convertible sofas with folding armrests and cup holders
  • Three-season removable garage wall/doors
  • Tuff-ply™ rubberized garage floor liner
  • Rear ramp door and patio with anti-slip, non-skid flooring
  • Ramp patio kit with exterior steps
  • Rear electric patio awning
  • LED high-intensity ramp lights
  • Ram air vents and power roof vent

Options

  • Frameless, dual-pane, tinted safety-glass windows
  • Outside HALO™ griddle for outside kitchens or JayPort® system (includes LP quick-connect) (select models)
  • Queen residential foam-top mattress (395 & 399)
  • Retractable half-bath wall in garage (395 & 399)

Standard Features
and Options

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