2025 Jayco Seismic 399

New Toy Hauler in Williamstown, New Jersey, 08094

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New 2025 Jayco Seismic 399 available in Williamstown, New Jersey

2025 Seismic 399 by Jayco from White Horse RV Center in Williamstown, New Jersey

Choosing White Horse RV Center means more than just buying an RV; it’s about investing in a seamless, enjoyable experience. With over 50 years of expertise, we ensure your RV journey is fun and hassle-free. Our RV Essentials Package and transparent pricing eliminate surprises and ensure no hidden costs. Plus, enjoy peace of mind with a complimentary Route 66 Customer Care Promises membership. There’s never been an easier or more enjoyable way to buy an RV. Discover the difference with White Horse RV Center—your trusted partner in RV adventures!

Experience The Jayco Difference

Find your freedom in a reliably built, smartly designed Jayco RV that includes an industry-leading 2-year limited + 3-year structural warranty! You won't find a better one in the business.

This 2025 Jayco Seismic Toy Hauler, Stock# SE15258, comes equipped as follows:

Customer Value Package: Mor-Ryde Strut Assisted Fold Away Entrance Steps
(Main Entrance), 50-Amp Service and 3rd A/C Prep, Electric Awning w/ LED
Lights, 2nd Awning, 16 Gal Gas/Electric DSI Water Heater, Residential King (72
in. x 80 in.) Mattress w/Under Bed Storage, Custom Machined Aluminum Rims,
4K Smart LED HDTV w/ Fully Digital HDMI® Ouput, AM/FM/DVD/CD/Bluetooth®
Stereo w/4 Speakers, Oven w/3 Burner Recessed Cooktop, Keyed-Alike™ Lock
System, Rooftop and Ground Solar Prep, Hidden Hinges with Magnets on Cabinet
Doors, Dove Tail Jointed Drawers, Bathroom Power Vent, Night Shades, 17 cu. ft.
12V Refrigerator, 30" Space Saver Microwave, Do It All Kitchen Sink.

4-Star Handling Package: 17.5" H rated 16 ply Uniroyal Tires, Dexter® Axles
w/ ABS and Tow Assist - includes Nev-R-Adjust® Brakes and E-Z Lube® Hubs,
Wet Bolt Fasteners with Bronze Bushings and 4000 lb. Leaf Springs, Roto Flex King Pin.

This Stock# SE15258 also has the following factory options included: 15,000 AC Drop In Cargo, Half Bath & Vintage Classic Interior Decor ... all backed by Jayco’s 2+3 year warranty! MSRP $133,369.

Please visit, call or text Sales at 856-262-1717, or email for more details, then get ready to enjoy travel in comfort and style in your new Jayco Seismic Toy Hauler!

2025 Jayco Seismic 399 Features

2025 Jayco Seismic 399 Specifications

Price

MSRP

$128,611

MSRP + Destination

$128,611

Currency

US Dollars

Basic Warranty

24 Months

Structure Warranty

36 Months

Roof Warranty (Years)

Dimensions

Length (ft)

45.92

Length (in)

551

Length (ft/ft)

Length (ft/in)

Length (m)

Length (mm)

14000

Width (in)

102

Width (mm)

2590.8

Height (in)

161

Height (mm)

4089.4

Interior Height (in)

Interior Height (mm)

2489.2

Weight

Dry Weight (lbs)

14560

Dry Weight (kg)

6604.4

Payload Capacity (lbs)

5435

Payload Capacity (kgs)

2465.3

GVWR (lbs)

19995

GVWR (kgs)

9069.7

Hitch Weight (lbs)

3395

Hitch Weight (kgs)

1540

Holding Tanks

Number Of Fresh Water Holding Tanks

Total Fresh Water Tank Capacity (gal)

106

Total Fresh Water Tank Capacity (l)

401.3

Number Of Gray Water Holding Tanks

Total Gray Water Tank Capacity (gal)

Total Gray Water Tank Capacity (l)

329.3

Number Of Black Water Holding Tanks

Total Black Water Tank Capacity (gal)

Total Black Water Tank Capacity (l)

329.3

Propane Tank(s)

Number Of Propane Tanks

Total Propane Tank Capacity (gal)

14.2

Total Propane Tank Capacity (lbs)

Construction

Body Material

Aluminum

Sidewall Construction

Fiberglass

Doors

Number of Doors

Sliding Glass Door

Slideouts

Number of Slideouts

Power Retractable Slideout

Yes

Awning

Number of Awnings

Awning Length (ft)

Awning Length (m)

12.8

Power Retractable Awning

Yes

Screened Room

Leveling Jacks

Leveling Jack Type

Front Power / Rear Power

Kitchen / Living Area

Kitchen / Living Area Flooring Type

Vinyl

Kitchen Table Configuration

Chairs

Kitchen Location

Center

Living Area Location

Center

Oven / Stove

Layout

Oven / Stove

Number Of Oven Burners

Oven Depth (in)

Oven Depth (mm)

533.4

Overhead Fan

Yes

Microwave Oven

Convection

Refrigerator

Refrigerator Size

Full-Size

Refrigerator Power Mode

Electric

Sofa

Number Of Sofas

Sofa Material

Vinyl

Reclining Sofa

Recliners / Rockers

Number Of Recliner / Rockers

Beds

Max Sleeping Count

Number Of Bunk Beds

Number Of Double Beds

Number Of Full Size Beds

Number Of Queen Size Beds

Number Of King Size Beds

Number Of Convertible / Sofa Beds

Master Bedroom

Master Bedroom Flooring Type

Vinyl

Master Bedroom Door Style

Conventional Door

Full Size Master Bedroom Closet

Yes

Master Bedroom Mirror Doors

Yes

Master Bedroom Shades / Curtains

Yes

Master Bedroom Location

Front

Bunkhouse

Bathroom

Number Of Bathrooms

Bathroom Flooring Type

Vinyl

Bathroom Location

Center

Toilet

Toilet Type

Porcelain

Toilet Location

Center

Shower

Door Type

Plastic / Glass

Shower Location

Center

Bathroom Sink

Bathroom Sink Location

Center

Bathroom Medicine Cabinet

Bathroom Medicine Cabinet Location

Center

Bathroom Mirror

Bathroom Mirror Location

Center

Bathroom Vent / Fan System

Bathroom Vent / Fan System Location

Center

Cargo Area Dimensions

Cargo Area Length (in)

162

Cargo Area Length (mm)

4114.8

Cargo Area Flooring Type

Rubber

Cargo Area Rear Door

Cargo Area Rear Door Style

Ramp Door

Cargo Area Auxiliary Gas Tank

Cargo Area Auxiliary Gas Tank Capacity (gal)

Cargo Area Auxiliary Gas Tank Capacity (lbs)

113.6

Wheels

Wheels Composition

Aluminum

Number Of Axles

Tires

Tire Brand

Uniroyal

Rear Tire Width

215

Rear Tire Aspect Ratio

Rear Tire Speed Rating

Rear Wheel Diameter

17.5

Rear Tire (Full Spec)

Uniroyal Tires 215/75 R17.5H

Spare Tire

Spare Tire Location

Exterior Mounted

Brakes

Front Brake Type

Not Applicable

Rear Brake Type

Electric Drum

Battery

Battery Power Converter

Yes

Prewiring

Air Conditioning Prewiring

Yes

Cable Prewiring

Yes

Phone Prewiring

Heat Prewiring

Yes

TV Antenna Prewiring

Yes

Satellite Prewiring

Yes

Washer / Dryer Prewiring

Yes

Solar

Yes

Generator

Generator Type

Gas

Air Conditioning

Air Conditioning Type

Automatic

Air Conditioning (BTUs)

30,000

Heater

Heater Type

Automatic

Heater (BTUs)

35,000

Water Heater Tank

Water Heater Tank Capacity (g)

Water Heater Tank Capacity (l)

60.6

Water Heater Pump Power Mode

Electrical / Propane

Water Heater Tank Bypass

Yes

Tankless Water Heater

Emergency Exit(s)

Number Of Emergency Exits

Radio

Number Of Radios

Satellite

Speakers

Speaker Location(s)

Interior / Exterior

CD Player

Number Of Discs

Television

Number Of Televisions

Paint

Primary Color

White

Secondary Color

Black

Metallic

Paint Swatch File Name

Jayco/White_-_Black_Exterior_Color.gif

Interior Decor

Wallpaper

Yes

Interior Wood Finish

Yes

Exterior Patio / Deck

Exterior Patio / Deck Location

Rear

Wireless / Connectivity

Bluetooth Audio

Yes

Wi-Fi Capable

Yes

*MFG Specs are for base unit. Certain options may change specifications listed. Please consult dealer for more details. Data is provided by a 3rd party. RVUSA.com cannot guarantee the accuracy of the data presented.