NEW 2026 Grand Design Momentum 399M Fifth Wheel Toy Hauler Highlights:

Front Private Bedroom

Kitchen Island

Hybrid Desk/Dinette

Unobstructed Pass-Thru Storage

Side Patio

Adventure meets comfort in the 2026 Grand Design Momentum 399M, a fifth wheel toy hauler designed for off-road enthusiasts who want all the conveniences of home. The 12' 6" separate garage provides ample space for your ATVs, motorcycles, or other toys, and you can entertain outdoors with the side patio, complete with a 65" TV, 1.7 cu. ft. refrigerator, and exterior griddle. Optional Liftsuite system and underside lighting allow extra sleeping space or ambiance in the garage.

Inside, the fully equipped kitchen features a kitchen island, pantry, pull-out countertop extension, and plenty of prep space. Relax on the L-shaped sofa with recliners while watching the 50" TV and enjoying the fireplace. Need to get some work done on the road? The hybrid desk/dinette with windows makes it easy to stay connected. The full bathroom is conveniently located near the front private bedroom, which offers a queen bed slide (optional king), large closet with washer/dryer prep, dresser with TV prep, and comfortable space to unwind after a day of adventure.

Built for four-season travel, the Momentum toy haulers include a fully enclosed and heated underbelly, 5-sided aluminum cage construction, and triple insulated garage floor for extreme weather protection. The MORryde CRE3000 suspension system and upgraded axle hangers provide smooth towing, while interior luxuries include color-changing LED accent lighting, hardwood cabinet doors with hidden hinges, and a central vacuum system. Four included packages—Garage Package with Tuff-Ply flooring, Weather-Tek Package with Stealth AC, and Interior Luxury Package with solid surface countertops—ensure your travels are comfortable, stylish, and functional.

Why Buy from Campers Inn RV Tucson? Campers Inn RV Tucson offers the largest selection of Momentum toy haulers, transparent pricing, and a team of experts ready to help you find the perfect RV for your adventures. From your first step on the lot to years of service, your experience will be seamless, fun, and worry-free.