Grand Design Momentum M-Class 351MS

Momentum M-Class is the flagship of Grand Design's toy haulers, and the 351MS is its shortest floorplan, with the garage kept separate from the living area. A large fresh tank and a fuel station suit dry camping with toys, and it rides on independent suspension under a Worry-Free roof.

Approx. price: ~$192,156; maker starting price
Length: 39.9 ft
Sleeps: 6

Specifications

Size

Exterior length: 39.9 ft
Exterior height: 13.5 ft
Sleeps: 6
Slide-outs: 3

Tanks and power

Fresh water: 140 gal
Gray water: 52 gal
Black water: 104 gal
Factory solar: 330 W

Standard equipment named by the maker

Fifth-wheel toy hauler, 11-ft garage
330W roof solar, 50A Bluetooth controller (standard)
20 cu ft 12V refrigerator
60-gal fuel station
MORryde independent suspension; Worry-Free roof
Thermal roof R-40, triple-insulated main and garage floors

Weights

2027 maker figures

Dry weight (UVW): 15,760 lb
GVWR: 19,000 lb
Pin weight, dry: 3,000 lb
Cargo capacity (CCC): not published

3,240 lb between brochure dry weight and GVWR. Water (8.3 lb a gallon), food, gear, propane and dealer-added options all come out of it.

What these weights mean →

Size, to scale

051015202530354045 ft

Grand Design Momentum M-Class 351MS · 39.9 ft long · 13′6″ tall

Drawn to one scale from each camper's listed length and, where the maker publishes it, its exterior height. Outlines are typical for the camper type, not traced from this model. The figure is a 6 ft person. The dashed blue line is 25 ft, the length about 93% of national park campgrounds accept.