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 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. 

 

What Our Customers Are Saying

I will not shop anywhere else for our next camper!

We purchased a camper from a private party and were looking to get setup for the 4th of July. The service department was able to take time and go over the ins and out of my new to me camper and also install a solar charging system. I can’t Express how grateful I am and when it comes time… I will not shop anywhere else for our next camper!!! - Thomas
Price: $151,704
General RV
Location: Richmond, VA
Stock# 310938
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RV ID: 2528916#
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2025 398M Specifications
Sleeps 13
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
Hitch Weight 2980 lbs
GVWR 20000 lbs
Dry Weight 16174 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
Generator NPS 6000 eco
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 573FM4631SBB03051
For more information Contact Us

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