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New 2016 Grand Design Momentum 399TH

Video Tour Sold
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2016 399TH Features and Options
This unit has been sold. Please Click here to view our entire inventory of Momentum 5th Toy Haulers.

Your local dealer DOES NOT WANT YOU TO SEE HOW LOW OUR PRICES ARE! MSRP on this unit is $109,807. We are the Low Price Leader. Make sure you compare the options that we offer to your local dealers list! Buy with us and save THOUSANDS!


You can pack a whole lot of fun into this Momentum toy hauler fifth wheel by Grand Design!  Model 399TH offers a 13' garage for the toys, plenty of sleeping space for a few extra buddies to tag along, and kitchen and bath amenities like home. Check it and a half baths, a fireplace, an 18 cu. ft. refrigerator, and a fold down side patio, plus so much more!  How's that for living on the edge....of fun!

In the cargo area there is a side man entry door also, plus just off the garage you have access to a fold-down side patio to enjoy a little down time outside including a 16' awning overhead.

In the bedroom you can easily rest and enjoy a little down time. There is a comfortable queen or optional king size bed, dual nightstands, overhead cabinets, and a slide out closet for all of your clothing storage and more.

Options & Packages Installed
Momentum Interior Package (See Below)
Momentum Exterior Package (See Below)
Momentum Garage Package (See Below)
Weather-Tek Insulation Package (See Below)
Removable Garage Carpet Kit
Under Unit Blue LED Lighting Kit
12V Tank Heaters w/Interior Switch
Stainless Steel 18 Cu.Ft. 4-Door Refrigerator
6-Point Hydraulic Leveling System
29-32" Class LED TV in Bedroom
2nd 13.5k BTU A/C in Bedroom
Onan 5.5KW Gasoline Generator
3rd 13.5k BTU A/C in Garage
Bathroom Power Fan w/Rain Sensor
King Bed Upgrade
Convection Microwave
Happi-Jac® Electric Bunk System w/Folding & Removable Sofas
Rear Aluminum Deck System w/Rear Box Awning
Ramp Door Patio Steps w/Hand Rail
3-Season Garage Wall
Swivel Rocker Recliner for Garage Area
Momentum Branded Patio Lounge Chairs (2)
Exterior Entertainment Center
Auxiliary Fresh Water Tank

Interior Package
40-48" Class LED TV in Living Area
Stereo Entertainment System w/Bluetooth in Living Area
Night Shade Window Coverings
Central Vacuum System
Recessed LED Puck Lighting
30" Stainless Steel Microwave
Solid Surface Countertops & Sink Covers
Stainless Steel Undermount Kitchen Sink
3- Burner Stainless Steel Range w/ 22" Oven
Large Kitchen Pantry
Pre-Wired & Braced for 2nd A/C in Bedroom
Pre-Wired & Braced for 3rd A/C in Garage (Includes Energy Management System and 3-Zone Thermostat)
Washer/Dryer Prep
12 Gallon Gas/Electric Water Heater
Centralized Interior Command Panel (Living and Garage)

Exterior Package
Trail-Air® Rota-Flex® Pin Box
Trail-Air® Equa-Flex® Suspension (N/A 327M)
Correct Track® Suspension Alignment System
7,000 lb. Axles w/Ultra Lube Hubs
16” Aluminum Wheels
West Lake® E-Rated Tires w/NitroFill™
Slam-Latch Baggage Doors
Frameless Tinted Windows
Dual Entry Doors (Single Door on 376TH)
Partial Paint Gel Coat Fiberglass Front Cap
Easy Open Aluminum Entry Steps
Exterior Security Lights
Power Patio Awning w/LED Lighting
Enclosed Fuel Pump Station with Dual Fuel Tanks
Satellite TV Prep
All-In-One Exterior Utility Center
50 Amp Service
75 Amp Converter
12V Battery Disconnect
Generator Prep

Garage Package
2nd Power Patio Awning w/LED Lights
Protective Diamond Plate on Garage Sidewalls
In-Floor Garage Storage Box
2,500LB Rated Flush-Mount Tie-Downs
Ram-Air Garage Vents (Both Sides)
Tuff-Ply Gas and Oil Resistant Garage Flooring
Spring-Loaded Rear Ramp Door
Rear Cargo Loading Lights
29-32" Class LED TV in Garage
Stereo Entertainment System in Garage w/ DVD

Weather Tek Insulation Package
R-Value (R-40 Roof / R-45 Floor / R-11 Sidewalls / R-25 Garage Floor / R-24 Slideroom Floor)
Fully Enclosed and Heated, Underbelly and Storage Area
Enclosed and Heated Low Point Drains
Engineered Underbelly Airflow Heat Paths
Insulated Heat & A/C Ducts
Attic Vent
Plumbing Line Insulation Barrier

Standard Equipment Installed
Drop Frame Chassis
Under Mount 16” Spare Tire
High-Gloss Gel Coat Exterior Sidewalls
TV Prep in Bedroom
Digital TV Antenna w/Booster
Interior Blue LED Accent Lighting
Raised Panel Hardwood Cabinet Doors w/Hidden Hinges
Sofa w/Heat, Massage and LED Lighting Package
Residential Kitchen Faucet
Flush Mounted Range Cover
60” x 80” Queen Memory Foam Bed Mattress
Residential Style Headboard
Under Bed Storage Area
Individually Switched Reading Lights Over Bed
Bedside 110-Volt Outlets
One-Piece Fiberglass Shower w/Glass Door
Skylight Above Shower
Porcelain Toilet
Vessel Bowl Sink
Medicine Cabinet w/Mirrored Door
15k BTU A/C in Living Area
12v High Power Fan (Kitchen)
35k BTU High Output Furnace
Fireplace w/5,000 BTU Electric Heater

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Location: Nipomo
Stock# 6311
These photos and this video are of the actual unit.
2016 399TH Specifications
Sleeps 7
Slides 2
Length 43 ft 4 in
Ext Width 8 ft 5 in
Ext Height 13 ft 5 in
Hitch Weight 3400 lbs
Gross Weight 20000 lbs
Dry Weight 15900 lbs
Fresh Water Capacity 117 gals
Grey Water Capacity 104 gals
Black Water Capacity 104 gals
Tire Size 16"
Furnace BTU 40000 btu
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Grover Beach, CA 93433
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For more information, call us at 805-929-8095 or Contact Us
Grand Design Recreational Vehicles is a superior quality manufacturer of towable fifth wheel and travel trailer RV's. Based in Middlebury, IN, Grand Design RV focuses on providing the highest quality and more premium standard features than any other RV's in their class.

Founded by close friends Don Clark and brothers Ron and Bill Fenech (each having over 25 years of experience in the RV industry).  Although they have lead some of the most successful companies in the RV industry, and are proud of their accomplishments at Keystone RV, they recognized that it was becoming more difficult to stay in touch with the needs of customers, employees, and the products being built. 

So, in 2011 they began pursuing their dream of reconnecting on a more personal level with customers and dealers.  The result of that pursuit is Grand Design RV.  A company designed to create recreational vehicles that provide more features, better designs and unparalleled customer support!
Trailer Hitch RV is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us @805-929-8095 for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.