New 2024 Grand Design Momentum 399TH Toy Hauler Fifth Wheel
MASSIVE SALE! Visit us in-store or call 404-377-8000 for EXCLUSIVE ON-LOT only discounted pricing!


Grand Design Momentum Fifth Wheel Toy Hauler 399TH Highlights:
- Fold-Down Side Patio
- 13' Garage with Dual Entry
- Bath and a Half
- Island with Bar Stools
- 60-Gallon Fuel Tank
Get ready to elevate your adventure with the Grand Design Momentum 399TH Fifth Wheel Toy Hauler! Whether you're heading to an off-road park, a special event, or on a long road trip, this toy hauler has everything you need to make your experience unforgettable.
The 13' garage is designed for your toys with features like a Fast Ramp rear ramp door, 2,500 lb. rated flush-mount tie-downs, and protective diamond plate on the sidewalls. Plus, the Ram-Air garage vents on both sides provide optimal airflow. This versatile space can transform into an additional bedroom or living area with the optional Happi-Jac rollover sofas/table with top bed, plus you’ll have your very own half bath, LED TV, and ample storage for all your gear.
Inside, the spacious living and kitchen area welcomes you with dual slides, a center island with bar stools, a free-standing table, and luxurious theatre seating (or choose the super sofa option). With everything you need to make meals for the crew, you’ll enjoy all the comforts of home while on the go.
The fold-down side patio adds even more outdoor living space, complete with an LED TV, storage, and an elevated area for relaxation above ground.
Built for All Seasons, All Adventures
The Momentum 399TH is built to handle extreme weather conditions and outdoor adventures year-round. Featuring a thermal roof design, full-laminated walls, and a triple-insulated garage floor, this toy hauler ensures maximum durability and comfort, no matter the season.
The MORryde CRE3000 suspension system, upgraded axle hangers, and rubber pin box provide a smooth towing experience, while the interior is designed with luxury in mind. Enjoy color-changing LED accent lighting, raised panel hardwood cabinet doors with hidden hinges, and a central vacuum system to make cleanup a breeze.
Customize your toy hauler with four fantastic packages:
- Garage Package: Featuring Tuff-Ply gas and oil-resistant flooring.
- Weather-Tek Package: Equipped with a Stealth AC System for all-weather camping.
- Interior Luxury Package: Solid surface countertops throughout.
- Tech Package: Offering high-tech features for the ultimate convenience.
With the 60-gallon fuel tank and ample storage space, the Grand Design Momentum 399TH is designed to take you on your next adventure with ease and comfort.
Get Ready to Explore in Style—Choose the Momentum 399TH Toy Hauler Today!
Did not buy today, but I will be back! Shawn showed me what I asked to see and walked me through what might fit my needs. I am coming back when I'm ready to buy. Best prices on 2025 units. - Paul
Stock# 93222
Interior Color: SILVER MAPLE
Sleeps | 5 |
Slides | 3 |
Length | 43 ft 1 in |
Ext Width | 8 ft |
Ext Height | 13 ft 5 in |
Interior Color | SILVER MAPLE |
Hitch Weight | 3400 lbs |
GVWR | 20000 lbs |
Dry Weight | 15900 lbs |
Fresh Water Capacity | 155 gals |
Grey Water Capacity | 104 gals |
Black Water Capacity | 104 gals |
Tire Size | 17.5" |
Furnace BTU | 40000 btu |
Fuel Capacity | 60 gals |
Available Beds | Queen |
Refrigerator Type | 12V Stainless Steel |
Refrigerator Size | 20 cu ft |
Cooktop Burners | 3 |
Number of Awnings | 2 |
Axle Weight | 7000 lbs |
Garage Size | 13 ft |
LP Tank Capacity | 30 lbs |
AC BTU | 30000 btu |
TV Info | LR 49" LED TV, BR LED TV, Garage 32" LED TV, Ext. LED TV |
Awning Info | 14' & 16' Power w/LED Lights |
Axle Count | 3 |
Washer/Dryer Available | Yes |
Number of LP Tanks | 2 |
Shower Type | Sunken Tub/Shower |
Electrical Service | 50 amp |
VIN | 573FM4532RBB01983 |
Momentum 399TH Reviews
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