2026 Grand Design RV momentum m-class

Trailer Description

new 2026 grand design momentum 399m toy hauler — elevate every adventure if you’ve been searching for a fifth wheel toy hauler that checks every box—power luxury workspace entertainment and real off-grid capability—the momentum 399m was built for you. grand design’s flagship toy hauler welcomes thrill-seekers and full-timers alike with refined residential comforts and rugged durability that can keep up with wherever your journey leads. load up level up and live large the 12' 6" separate garage gives you the freedom to bring quads dirt bikes kayaks e-bikes—anything that fuels your weekends. once unloaded transform the space into an extra suite with the optional liftsuite system complete with under-glow accent lights for a premium touch. and when you want to take the party outside the side patio becomes your open-air living room—outfitted with a 65" tv a 1.7 cu. ft. fridge and an exterior griddle to keep everyone fed and smiling. a true chef's kitchen… indoors or outdoors rainy day? no problem. the interior kitchen is a culinary playground featuring a kitchen island pull-out countertop extension deep storage pantry and upscale appliances. whether you’re prepping trail-day snacks or hosting friends for dinner you’ll have the space and style to do it right. relaxation worth coming home to kick back in the main living area where an l-shaped reclining sofa faces a 50" tv and ambient fireplace—the perfect setup after a long day on the trails. need to squeeze in some work? the innovative hybrid desk/dinette with panoramic windows gives you a scenic remote-work station without sacrificing dining space. your private bedroom retreat at the front of the coach unwind in the spacious master suite with a queen bed slide optional king! a large wardrobe with washer/dryer prep and a dresser with tv prep. whether you’re weekend camping or living full-time this bedroom delivers the storage comfort and separation you need. built for all seasons & all terrains every momentum is engineered for durability and all-weather performance with a fully enclosed/heated underbelly 5-sided aluminum cage and triple-insulated garage floor. ride smoother with the morryde cre3000 suspension rubber pin box and upgraded axle hangers. inside enjoy upscale touches like hardwood cabinet doors hidden hinges solid surface countertops color-changing led lighting and even a central vacuum system. four premium packages—including the garage package weather-tek package and interior luxury package—ensure you don’t just arrive… you arrive in style. your toys deserve a better home. so do you. if you’ve dreamed of a toy hauler that works hard plays harder and pampers you at the end of every drive the 2026 momentum 399m is the one you’ll want to see first—and last. make it yours today at little dealer little prices—where your next adventure begins at a price you’ll feel great about. inventory images may be shown. colors and specs may vary. call for details.