Momentum M-Class 398M

Images of the 2025 Momentum M-Class 398M

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
Exterior Color	Optional Full Body Paint; Onyx, Onyx w/; Blue, Red, Orange. Sterling, Sterling w/; Blue, Red, Orange, Red, White & Blue
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
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

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.