2026 Grand Design Momentum M-Class 392M
- Year 2026
- Make Grand Design
- Model Momentum M-Class
2026 Grand Design Momentum M-Class 392M
2026 Grand Design Momentum M-Class 392M
Our top-of-the-line Momentum Fifth Wheel Toy Haulers are — inside and out — our most luxurious Toy Haulers. With the comfort of a master suite and master bath, home’s now a long way from your house.
Features may include:
- Thermal Roof Design (R-40)*
- Fully Laminated Walls (R-11)*
- Triple Insulated Main Floor (R-45)*
- Triple Insulated Garage Floor (R-40)*
- 1.5" Insulated Baggage Doors
- Vented Attic
- Insulated Gooseneck
- Rail-Tite Underbelly Seal
Dimensions
Overall Height
13' 6" | (w/opt. AC): 13' 6"
Overall Length
45' 11"
Overall Width
8' 5" | (w/ slide out): 13' 4"
Interior Height
8' 5"
Dimensions
Standard Bed: 60 X 80 Queen Bed | Shower: 48 X 30
Garage Length
17'
Awning Size
18 16
Weights
Hitch Weight Capacity
3,382 lbs.
Unloaded Weight
16,982 lbs.
GVWR
22,500 lbs.
Capacities
Fresh Water Capacity
140 gal.
Gray Water Capacity
104 gal.
Black Water Capacity
52 gal.
LP Tank Capacity
60 gal
Sleeping Capacity
9
Fuel Capacity
60 lbs
Water Heater
On-Demand
Refrigerator
20 cu. ft.
Features
Features
Propane Tanks: 2 | Construction Type: Aluminum Cage | Slide Room R-Value: R-11 | Garage R-Value: R-40 | Slides: 3 | Awnings: 2
R-Value, Floor
R-45
R-Value, Wall
R-11
R-Value, Roof
R-40
Operational
Furnace Output
35,000 BTU
Air Conditioner Output
45,000 BTU
Chassis
Axle Count
3
Wheels & Tires
Wheels
17.50 in.
Tires, Rear Specification
ST215/75R17.5R LRH