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New 2025 Grand Design Momentum 397THS

Virtual Tour
2025 397THS Features and Options

Priority RV Network Benefits

Grand Design Momentum fifth wheel toy hauler 397THS highlights:
  • Dual Entry
  • Two Full Baths
  • Kitchen Island
  • 13' 6" Separate Garage
  • Island with Bar Stools
  • Flip-Up Pet Dish in Garage

 

Load up your toys, your clothes and food and start your adventure as you smoothing tow this fifth wheel to your campsite. You will enjoy the Fast Ramp rear ramp door, the Ram-Air garage vents on both sides, and the 2,500 lb. rated flush-mount tie-downs to keep your toys secure. You will surely appreciate the full bathroom and LED TV, plus the option to add Happi-Jac rollover sofas/table with a top bed. The main area provides a living and kitchen area with a 49" LED TV and a fireplace, theatre seating and a free standing dinette, plus full kitchen amenities. There is also a new Smart Sink with a removable cutting board, produce strainer and glass rinser you are sure to love. Head up front to use the full bathroom with a one-piece fiberglass shower with a glass door and teak seat, and fall quickly to sleep on your own queen bed or choose a king option in the front bedroom. 

 

The Momentum fifth wheel toy haulers by Grand Design are built for four seasons of travel with your off-road toys and include luxurious accommodations throughout for extreme living! Each is constructed to a superior standard with the thermal roof design, the full-laminated walls, and the triple insulated garage floor. The MORryde CRE3000 suspension system and rubber pin box, plus the upgraded axle hangers provide the performance and smooth towing you desire, while the interior offers luxury such as color changing LED accent lighting, raised panel hardwood cabinet doors with hidden hinges, and a central vacuum system. Each toy hauler also includes four packages, including the Garage Package with Tuff-Ply gas and oil resistant flooring, the Weather-Tek Package with a Stealth AC System, and the Interior Luxury Package with solid surface countertops!

 

 

Options:
  • 20 CU FT 12V REFRIGERATOR
  • 3RD A/C
  • 3RD A/C PREP
  • 3RD AWNING
  • 7K AXLE W/ABS DRUM BRAKES
  • AUXILLARY FRESH WATER TANK
  • BEDROOM A/C
  • EXTERIOR ENTERTAINMENT CENTER
  • EXTERIOR PKG
  • GARAGE PKG
  • GEN II 3 SEASON DOOR
  • HAPPI-JAC ELECTRIC BUNK
  • HEAT PUMP A/C
  • INTERIOR PKG
  • KING BED UPGRADE
  • MOMENTUM PATIO CHAIRS
  • REAR ALUMINUM DECK SYSTEM
  • ROCKFORD FOSGATE STG 1
  • RVIA SEAL
  • SAFERIDE RV ROADSITE
  • SOLAR ½ PKG
  • TRAVLFI ON-BOARD WIFI
  • UNDER UNIT LED LIGHT KIT
  • UPGRADED COOPER H RATED TIRES
  • WEATHER-TEK INSULATION PKG
  • YAMAHA GENERATOR
What Our Customers Are Saying

Excellent experience

"Buying a travel trailer from Happy Daze has been one of my smoothest, hassle free transactions for an RV to date. My sales rep Dan Risk was an excellent communicator and did his best to answer all my questions. He really came across as an advocate for me the customer and really got me locked into buying through Happy Daze vs. wasting my time price shopping via the internet. The financing rate was - Aaron
MSRP: $172,933
Location: Gilroy
Stock# 69998
2025 397THS Specifications
Sleeps 4
Slides 3
Length 44 ft 2 in
Ext Width 8 ft 5 in
Ext Height 13 ft 5 in
Int Height 8 ft 5 in
Interior Color MAGNOLIA
Hitch Weight 3375 lbs
GVWR 20000 lbs
Dry Weight 15600 lbs
Fresh Water Capacity 140 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 3
Axle Weight 7000 lbs
Garage Size 13 ft 6 in
LP Tank Capacity 30 lbs
Water Heater Type On Demand
AC BTU 30000 btu
TV Info LR 49" LED TV, BR LED TV, Garage 32" LED TV
Awning Info 14', 12' & 10' Power w/LED Lights
Axle Count 3
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Shower w/Seat
Electrical Service 50 amp
VIN 573FM4636SBB03109
For more information, call us at 408-842-2221 or Contact Us
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ManuFacts
Grand Design Logo
In 2012, we started with a blank canvas to pursue that better way, a different way, than what had been done before. A company whose culture requires a long-term, personal connection with our customers, employees, and dealers – that company is Grand Design RV. Our business model of doing the right thing has led us to unparalleled years of growth.
 
Our local workforce has been hand-picked and has an excellent reputation for second-to-none industry craftsmanship, and our CEO and Senior Management actively work with the production facilities to help build the team and develop products.
 
At Grand Design we've raised the quality bar by putting every unit through a series of quality inspection gates during the manufacturing process. Once completed, the unit undergoes a comprehensive “final finish” inspection. Every one of our coaches is shipped to a PDI (Pre-Delivery Inspection) area where they are put through a rigorous 300+ point inspection checklist before being shipped to our dealers.  And, we back every one of our coaches with a 3-year limited structural warranty.  
 
At Grand Design our goal is simple – continue leading the industry with quality products while improving the customer’s RV experience before, during and after the sale. We strive for nothing less than customers for life and we would be honored to personally welcome you to the Grand Design RV family!

Happy Daze RV is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales taxes, registration, tags and delivery fees. Manufacture pictures, specifications, and features may be used in place of actual units on our lot. To preserve the quality and mileage of our coaches, we only do test drives with a qualified offer to purchase.