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2024 Grand Design Momentum M-Class 397THS

Fifth Wheel
  • Type: Fifth Wheel
  • Layout: Toy Hauler
MSRP $170,866
Good Life Price: $140,999



2024 Grand Design Momentum M-Class 397THS

The Momentum Fifth Wheel Toy Hauler is the point where absolute luxury meets mobile garage! We have completely raised the Toy Hauler bar by incorporating an elegant Master Bath and Master Suite (with a full walk-in closet) into this unit! But trust us, we didn’t ignore the Living and Garage areas. Check out our Floorplan Fly-Through Videos and get a feel for the extraordinary space we’ve created. We know you will agree with us when we say that “The Momentum RV is the place to live well and play hard!”.

Our new Momentum M-CLASS Fifth Wheel Toy Haulers are lighter but are no lightweights when it comes to features. Inside and out, the Grand Design M-CLASS series has redefined the look and feel of the toy hauler. When it comes to elegant design and amenities, one word encapsulates it… “CLASS”.

This 397THS is the biggest and best of the best we have all come to love.  Some features include a bedroom bed slide, his & hers closets, separated by either shelving or a Washer/Dryer setup and Dual access to the bathroom.  For sale at Good Life RV in Des Moines, Iowa. 515-462-9800


  • STOCK #: PB02562
  • Location: Des Moines
  • Condition: New
  • GVWR lbs: 20,000
  • Unloaded lbs: 15,600
  • Hitch Weight: 3,375
  • Fresh Gals: 140
  • Grey Gals: 104
  • Black Gals: 104
  • Slideouts: 3
  • Sleeps: 6
  • Layout: Toy Hauler
  • Interior Color: Graphite
  • LENGTH: 44 ft

Options Included

  • 20 Cu Ft 12V Refrigerator (+Inverter Prep, 330W Solar Panel, 50 AMP Controller, Bluetooth Module & Two Dock Ports)
  • 3rd A/C
  • 3rd A/C Prep
  • 3rd Awning (Main Slide)
  • 7k Axle w/ABS Brakes (Triple Axle)
  • Auxiliary Fresh Water Tank
  • Bedroom A/C
  • Exterior Entertainment Center
  • Gen II 3 Season Door with Sliding Windows
  • Generator-Onan 5.5KW Gasoline Generator
  • Happi-Jac Electric Bunk System w/Folding Sofas
  • Heat Pump A/C
  • King Bed Upgrade
  • Momentum Exterior Package
  • Momentum Garage Package
  • Momentum Interior Package
  • Momentum Patio Chairs
  • Momentum Weather-Tek Insulation Package
  • Rear Aluminum Deck System w/Rear Power Awning
  • Rockford Fosgate Stage 2 Stereo Upgrade - 900 Watts, Int/Ext Speaker Upgrade w/ Addt'l Ext Sub & Source Unit
  • RVIA Seal
  • Solar Prep
  • Solar+ Package (Dual 330W Panels, 2000W Inverter, 50 Amp Controller, 2 Dock Ports, Bluetooth Module)
  • Under Unit LED Light Kit
  • Upgraded Cooper H-Rated tires w/17.5" Wheels (Triple Axle)

Momentum M-Class 397THS 3D Video Tour

Tours may have options and features that differ from actual In-Stock Unit. Verify your features and options.

Floor Plan




  • 12 Gallon Gas/Electric Water Heater
  • 12v High Power Fan - Master Bath
  • 12v High Power Fan (Kitchen)
  • 12V Tank Heaters (All Tanks)
  • 15K Main A/C w/Race Track Ducting
  • 18Cu. Gas/Electric Fridge
  • 32" LED TV in Bedroom
  • 32" LED TV in Garage
  • 35k BTU High Capacity Furnace
  • 49" Class LED TV in Living Area
  • Backup Camera prep
  • Bedside USB Charging Ports
  • Central Vacuum System w/ Tools and Dust Pan
  • Chef Inspired Range & Oven
  • Deep Seated Stainless-Steel Sink
  • Entertainment Center w/LED TV
  • Fireplace w/ 5,000 BTU Electric Heater
  • Glass Range Cover (Flush w/Counter Top)
  • High-Capacity Water Pump with Interior and Exterior Switch
  • LED Lighting Throughout with Motion Sensors (Key Areas)
  • One-Piece Fiberglass Shower w/Glass Door
  • Porcelain Toilet w/Foot Pedal Flush
  • Power Awning w/LED Lights
  • Quick Recovery Water Heater
  • Rockford Fosgate Exterior Speakers
  • Rockford Fosgate Speaker Package w/12" Sub and 300W Amp
  • Solar Prep & Wiring
  • Stainless Steel Accented 3-Burner Range w/ Oven
  • Stainless Steel Accented Microwave
  • Stainless Steel Farm Sink w/Sink Cover & Pullout Kitchen Faucet
  • Stereo Entertainment System w/Bluetooth & App Based Controls in Living Area
  • Universal Docking Stations
  • Washer/Dryer Prep


  • 60" x 80" Queen Bed
  • Closet/Pantry
  • Entertainment Center LED TV w/Fireplace
  • Flip Top Dresser with Telescoping TV
  • Free Standing Table & Chairs
  • Happi-Jac Rollover Sofas & Table w/Top Bed
  • Kitchen Island w/2 bar stools
  • Linen Storage
  • Medicine Cabinet w/ Mirror
  • Night Shades
  • Night Stands
  • Overhead Bed
  • Ramp Patio
  • Residential Countertops
  • Sunken Shower w/Skylight
  • Theater Seating
  • Under Bed Storage
  • Walk In Shower with Skylight
  • Washer/Dryer Prep between His/Her Closets


  • Bath-and-a-Half
  • Front Bedroom
  • Rear Garage


  • Battery Disconnect
  • Carbon Monoxide Detector
  • Fire Extinguisher
  • Folding Entry Handle
  • LP Detector
  • Safety Breakaway
  • Smoke Detector
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  • 1 control 7" Touchscreen Control Panel w/App Controls & Redundant Slide Switches
  • 13'6" Garage Length
  • 2,500 lb. Rated Flush-Mount Tie-Downs
  • 44'2" Overall Length
  • Attic Vent
  • Bath and a Half
  • Black Tank Flush
  • Diamond Plate Front Rock Guard
  • Double Entrance Bathroom
  • Easy Clean Vinyl Flooring
  • Enclosed and heated low point drains
  • Enclosed Fuel Station w/ Dual Fuel Tank(Single Tank 376THS)
  • Engineered Underbelly Airflow Heat Paths
  • Full Sized Rear Ramp Door
  • Gel Coat Fiberglass
  • Heated & Enclosed Underbelly w/Suspended Tanks
  • Kitchen Pantry w/ LED Light Strip
  • Laminated Aluminum Framed Rear Ramp Door (R-12)
  • Laminated Aluminum Framed Roof and End Walls in Slide Rooms (R-7)
  • Laminated Aluminum Framed Side Walls (R-7)
  • Large Panoramic Windows
  • No-Rust Aluminum Entry Steps
  • Painted Front Cap w/48" LED Accent Lighting
  • Plumbing Line Insulation Barrier
  • Protective Diamond Plate on Garage Sidewalls
  • R-Value Equivalent (R-40 Roof / R-45 Floor / R-11 Sidewalls / R-40 Garage Floor / R-24 Slideroom Floor)
  • Rear-ramp Loading lights w/Backup Light Function
  • Recessed LED Puck Lighting
  • Roller Shade Window Coverings(Main Living Area and Bedroom)
  • Stealth AC System w/ Insulated A/C Ducts
  • Triple Layer Floor Insulation
  • Tuff-Ply Gas and Oil Resistant Garage Flooring
  • Universal All In One Docking Station
  • Walk On Roof Decking
  • Washer/Dryer Prep


  • 2,500 lbs. Tie-downs Anchored into the Chassis
  • Drop Frame Chassis (12" over 10")
  • Full Sized Spare Tire & Carrier
  • Heavy Duty Tires w/Nitro Fill
  • MORryde® CRE3000 Suspension System
  • Ramp Door Patio Deck Railing System
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Disclaimer: We make every effort for complete and accurate descriptions of our RVs, but manufacturers and certain campers have changes or options that may not be noted and may differ. GLRV is not to be held responsible for misprints. Please verify the equipment on your RV before purchasing.
2024 Grand Design Momentum M-Class 397THS
MSRP $170,866
Good Life Price: $140,999
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