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2026 Jayco Seismic 399
NewStock #9894
Listing price
2026 Seismic 399
Other floor plans with a similar body style, feature mix, and price range, prioritizing other manufacturers and brands.
What sells people on the Jayco Seismic 399 is the combination of a serious garage and genuine living space, all wrapped into one 46-foot fifth wheel. The bath and a half is the quiet hero here, giving your crew a second toilet so the main bath stays free, and two entry doors keep foot traffic flowing between the garage and the front bedroom. It sleeps eight and carries a hefty payload, so the gear comes along without a fight. If you're shopping used, it's worth giving the plumbing, hydraulics, and finish work a close look before you buy.
Length
45 ft 11 in
Dry weight
14,950 lbs
GVWR
20,400 lbs
Sleeps
9
Many factors play into a unit's listing price and what you should pay. This guide provides a ballpark estimate, but it does not factor in your exact scenario or how different listings are equipped.
There may be room for price negotiation.
$79,995 – $112,995
This unit is ranked 8 of 56 by asking price in this group.
The listing price on this unit has changed 2 times.
See the complete price timeline and the rest of this unit's pricing insights.
Zoomers RV
Wabash, IN
Compared with 1,114 dealers nationwide
Introducing the 2026 Jayco Seismic Toy Hauler, a new fifth-wheel designed for adventure seekers and families alike. With a spacious layout that comfortably sleeps up to 9, this impressive RV boasts a length of 45.92 ft, a dry weight of 14,950 lbs, and a GVWR of 20,400 lbs, making it easy to tow and maneuver. Featuring three slides for added space, a walk-in shower, and a 30,000 BTU air conditioning system, the Seismic ensures comfort in any climate. Its robust black water capacity of 87 gallons and fresh water capacity of 106 gallons allow for extended trips off the grid. Schedule your tour today!
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