RVs, Campers, Motorhomes and Caravans » Jayco » Seismic 399

Jayco Seismic 399 Specifications

Specifications

Rv typeFifth-wheel toy hauler
Overall length12.6-13.7 m
Gross vehicle weight rating (gvwr)13608-15876 kg
Unloaded vehicle weight (approx.)9525-11340 kg

Jayco Seismic 399 description

The Jayco Seismic 399 is a fifth-wheel toy hauler designed for active RVers who need a rugged, comfortable mobile base. It combines a spacious living area with a versatile rear garage, heavy-duty systems and residential-style amenities for extended trips. Built to haul toys and deliver home-like comfort, the Seismic 399 is aimed at users who want adventure-ready storage without compromising on interior livability.

Currently For Sale

  • 2026 Jayco Seismic 399

    2026 Jayco Seismic 399

    • Manufacturer: Jayco
    • Model: Seismic 399
    • Gross weight: 13,608 kg
    • Tire size: 17.5"

    Description 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 Get ready for outdoor advent...

    Madison, OH
  • 2026 Jayco Seismic 399

    2026 Jayco Seismic 399

    • Manufacturer: Jayco
    • Model: Seismic 399
    • Gross weight: 13,608 kg
    • Tire size: 17.5"

    Description 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 Get ready for outdoor advent...

    Ripley, WV
  • 2026 Jayco Seismic 399

    2026 Jayco Seismic 399

    • Manufacturer: Jayco
    • Model: Seismic 399
    • Gross weight: 13,608 kg

    Click here for options and features Length: 47 ft | Dry weight: 15725 lbs | Sleeps up to: 7 | Slideouts: 3 | Awnings: 3 | Brand: Jayco Seismic | Interior color: Modern Cappuccino | Fresh water capacity: 106.0 gal...

    $108,995 USD
    Erie, PA
  • 2026 Jayco Seismic 399

    2026 Jayco Seismic 399

    • Manufacturer: Jayco
    • Model: Seismic 399
    • Gross weight: 13,608 kg
    • Tire size: 17.5"

    Description 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 Get ready for outdoor advent...

    Mount Morris, PA
  • 2026 Jayco Seismic 399

    2026 Jayco Seismic 399

    • Manufacturer: Jayco
    • Model: Seismic 399
    • Gross weight: 13,608 kg
    • Tire size: 17.5"

    Description 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 Get ready for outdoor advent...

    Mount Morris, PA
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