New 2026 Grand Design Momentum

• Spacious rear garage toy hauler room for quads, bikes, side-by-sides, or gear

• Side patio with outside kitchen and entertainment

• Two large slide-outs open the living/kitchen area wide

• Front bedroom with privacy and solid storage

• Full galley kitchen with island, big fridge, and real prep space

• Comfortable living area with theater seating and sofa

• Large bathroom with separate shower and good circulation

• Excellent tank capacities and utility setup for longer trips

• Built solid with Grand Designs everyday-use quality

• Power awning with LED lighting and ample exterior storage

If you want a toy hauler that doesnt feel like a toy hauler meaning it lives comfortably inside whether youre hauling toys or not the 2026 Grand Design Momentum 399M delivers exactly that. The rear garage is spacious enough for quads, bikes, or gear with real tie-downs and a proper ramp, but once youre parked and set up, the interior feels like a real home on wheels.

The dual slide-outs make a huge difference with them out, the kitchen and living area feel wide, open, and easy to walk around in instead of cramped. The kitchen itself is laid out thoughtfully with an island that gives you serious prep space, a big fridge, and storage that actually works. Youre not juggling pots and pans in every nook and cranny youve got room to cook.

The living area has comfortable seating theater seats and a sofa youll actually use with a good entertainment setup, so relaxing after a long day doesnt feel like an afterthought. Up front, the private bedroom gives you a real bed and plenty of storage, and the bathrooms layout is practical with a good-sized shower and useful circulation.

Tank capacities and utility hookups are sized for extended stays no stressing about hookups after a night or two. Outside, the power awning with LED lighting makes the campsite area feel like an extension of the interior, and the exterior storage bays are deep enough for chairs, tools, grills, and whatever gear you bring along.

Bottom line: the Momentum 399M is comfortable, practical, and built for real adventure whether youre hauling toys or just want a big, well-laid-out rig for camping, road trips, or extended travel. Easy to live in, easy to enjoy exactly what you want out of a modern toy hauler.