Used 2021 Grand Design Momentum M-Class 351M Toy Hauler Fifth Wheel
11' Garage; Private front bedroom; Residential Kitchen
Key Features of the Pre-Owned Grand Design Momentum M-Class 351M
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11' separate garage with ramp door for toys or gear
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Triple slide-outs for expanded living space
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Bath-and-a-half floorplan for added convenience
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Private front bedroom with queen bed and wardrobe storage
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Loft sleeping area plus convertible garage space
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Residential kitchen with large refrigerator and solid-surface countertops
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Dual power awnings with LED lighting
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60-gallon fuel station for toys
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Generator prep or onboard generator
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Heated and enclosed underbelly for extended-season camping
Discover the Pre-Owned Grand Design Momentum M-Class 351M
The Grand Design Momentum M-Class 351M is a high-end toy hauler fifth wheel built for travelers who want to bring their adventures with them—without sacrificing comfort. With a spacious layout, dedicated garage, and residential-style living area, this RV is perfect for weekend warriors, motorsports enthusiasts, or full-time travelers.
At nearly 39 feet long with three slide-outs, the 351M delivers a wide-open interior while still maintaining strong towability for a properly equipped truck.
Garage Meets Living Space
The 11-foot garage is the heart of this toy hauler, offering space for ATVs, motorcycles, bikes, or gear. When unloaded, it easily converts into additional living or sleeping space with seating and overhead storage—making it incredibly versatile for guests or family.
A convenient half bath in the garage area adds functionality, especially when traveling with multiple people.
Comfortable Residential Interior
Up front, the main living area features theater seating, entertainment space, and a fully equipped kitchen with residential appliances and plenty of storage. The private master bedroom offers a quiet retreat with a queen bed and wardrobe space, while the loft and garage sleeping options increase total capacity.
Built for Adventure
This Momentum is designed for serious travel, with features like a fuel station for your toys, large holding tanks, and a durable construction with insulated garage flooring.
Whether you're heading to the dunes, mountains, or campground, this toy hauler is ready to go.
Why Buy the Grand Design Momentum 351M
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Bring your toys and gear wherever you travel
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Spacious garage that doubles as living space
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Ideal for families or group camping
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Residential comfort in a rugged, adventure-ready design
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Trusted Grand Design quality and durability
Why Buy from Lazydays RV Powered by Campers Inn RV
Choosing the right RV is only half the journey. Choosing the right dealership makes all the difference. When you purchase from Lazydays RV powered by Campers Inn RV, you gain:
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A Legacy of Trust
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Extensive Inventory and Competitive Pricing
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Certified Service and Support
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Parts and Accessories
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A Long-Term Camping Partner
Thank you, Sharon, for the outstanding service at Summerland RV. Its people like you that makes all the difference in the RV Industry. I called you as a Winnebago Dealership, you listened to what I needed, ordered the parts, and did not give me the traditional run around. I truly appreciated the leadership, sincerity in you organizing everything for me to come in to have the parts installed in a timely - Wallace
You Save: $5,000
Sale Price: $49,995
Stock# 112170A
| Sleeps | 5 |
| Slides | 3 |
| Length | 38 ft 6 in |
| Ext Height | 13 ft 5 in |
| Hitch Weight | 2785 lbs |
| GVWR | 16800 lbs |
| Dry Weight | 13800 lbs |
| Fresh Water Capacity | 155 gals |
| Grey Water Capacity | 78 gals |
| Black Water Capacity | 78 gals |
| Tire Size | 16" |
| Furnace BTU | 40000 btu |
| Fuel Capacity | 60 gals |
| Available Beds | Queen |
| Refrigerator Size | 18 cu ft |
| Cooktop Burners | 3 |
| Number of Awnings | 2 |
| Axle Weight | 7000 lbs |
| Garage Size | 11 ft |
| LP Tank Capacity | 60 lbs |
| Water Heater Capacity | 12 gal |
| Water Heater Type | Gas/Electric |
| TV Info | LR 49" LED TV |
| Awning Info | 10' and 18' Power with LED Lights |
| Axle Count | 2 |
| Washer/Dryer Available | Yes |
| Shower Type | Sunken Tub/Shower |
| Electrical Service | 50 amp |
| VIN | 573FM4027M1117896 |
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