New 2025 Grand Design Momentum M-Class 398M Toy Hauler Fifth Wheel

Virtual Tour
2025 398M Features and Options

Grand Design Momentum M-Class toy hauler 398M highlights:

  • 18' Separate Garage
  • Bedroom Wardrobe Slide
  • Four-Seat Super Sofa
  • Kitchen Island with Bar Stools
  • Dual Entry Doors
  • Flip Up Pet Dish

 

Load up your toys, gear, clothes and food to enjoy some off-road fun with your toys and friends! Once at the RV park, unload your toys and set up the three slide outs and two awnings, and begin planning your trail rides! You might decide to make a meal or snack in the combined kitchen and main living area which offers all the appliances you need, plus a kitchen island with two bar stools, a pantry, an LED TV with a fireplace below, plus a slide out four-seat sofa. The garage even offers sofas and an overhead bed plus the option to add two additional Happi-Jac rollover sofas with tables with a top bed if you want seating and sleeping space. The overhead loft bed provides sleeping space as well. You will love the shower with a seat in the full bathroom with a space saving sliding door, and the front bedroom can be your escape. There is a queen bed, a slide out wardrobe and USB charging outlets.

 

With any Momentum M-Class toy hauler by Grand Design, you will enjoy luxury at every turn! They have been constructed to a superior standard with a thermal roof design, triple insulated main floor and garage floor, and a Rail-Tite underbelly seal that will allow you to camp in all elements. Each model also features an 8' 5" wide body chassis with a wide rail design, no wheel wheels, and a dovetail entry for easier loading. The Stealth A/C system provides maximum cooling power, and the CRE3000 suspension system means you can enjoy a smooth tow each time. You will love the luxurious interior with a professional grade stainless steel cooktop, interior color changing LED accent lighting, a fiberglass shower with a glass door, and solid surface countertops. 

 

Options:
  • 20 CU FT 12V REFRIGERATOR
  • 3RD A/C
  • 3RD A/C PREP
  • 7K AXLE W/ABS DRUM BRAKES
  • AUXILLARY FRESH WATER TANK
  • BEDROOM A/C
  • EXTERIOR ENTERTAINMENT CENTER
  • EXTERIOR PKG
  • GARAGE LED HD TV
  • GARAGE PKG
  • GEN II 3 SEASON DOOR
  • HAPPI-JAC ELECTRIC BUNK
  • HEAT PUMP A/C
  • KITCHEN POWER FAN W/ RAIN S
  • LUXURY INTERIOR PKG
  • 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

Great experience!

I was working in Gillette for the day and had furnace issues , called and asked if they could help me out. They were very helpful and were able to fix it and get me on my way. This was all done in no time and without an appointment. Great experience - Von
Price: $160,050
Happy Daze
Location: Bakersfield
Stock# 69942
To get help now on this RV, call and enter the RV ID if prompted.
RV ID: 2611043#
(enter this ID if prompted)
2025 398M Specifications
Sleeps 8
Slides 3
Length 43 ft 10 in
Ext Width 8 ft 5 in
Ext Height 13 ft 5 in
Int Height 8 ft 5 in
Interior Color MAGNOLIA
Hitch Weight 2980 lbs
GVWR 20000 lbs
Dry Weight 15000 lbs
Fresh Water Capacity 140 gals
Grey Water Capacity 52 gals
Black Water Capacity 52 gals
Tire Size ST215/75R17.5 LRH
Furnace BTU 35000 btu
Fuel Capacity 60 gals
Number Of Bunks 1
Available Beds Queen
Refrigerator Type Stainless Steel
Refrigerator Size 20 cu ft
Cooktop Burners 3
Number of Awnings 2
Axle Weight 7000 lbs
Garage Size 18 ft
LP Tank Capacity 30 lbs
Water Heater Type On Demand
AC BTU 30000 btu
TV Info LED TV; LR 49", Garage 32"
Awning Info 16' and 18' Power with LED Lights
Axle Count 3
Washer/Dryer Available Yes
Number of LP Tanks 2
Shower Type Shower w/Seat
Electrical Service 50 amp
VIN 573FM4635SBB03053
For more information Contact Us

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