2017 GRAND DESIGN MOMENTUM 399TH

2017 Grand Design Momentum 399TH – The Ultimate Luxury Toy Hauler

Experience the perfect fusion of rugged adventure and residential luxury in the 2017 Grand Design Momentum 399TH — a premium fifth wheel toy hauler engineered to elevate your camping lifestyle to new heights. With a massive 13' garage, luxurious living space, and enough water and fuel capacity to keep you off-grid for days, this unit was built for the thrill-seekers who demand first-class comfort.

Crafted with Grand Design’s signature Aluminum Cage Construction and industry-leading insulation values — R-45 floors, R-40 roof and garage, and R-11 walls and slide rooms — this Momentum is ready for any season. Whether you’re in the mountains or the desert, this rig is built to handle it all with ease.

With triple axles, heavy-duty 17.5" wheels, and ST215/75R17.5 LRH tires, the 399TH hauls with confidence and stability. It’s equipped with a 60-gallon fuel station to keep your toys running and 140 gallons of fresh water so you can stay off-grid longer. Two massive awnings (10' and 17') provide tons of outdoor shade and entertainment space.

Step inside and you’re greeted with residential-style luxury:

• 8'5" interior height makes the entire coach feel open and spacious.

• A 20 cu. ft. refrigerator, on-demand hot water, and a 35,000 BTU furnace offer true comfort wherever you are.

• The queen-size master bed (with optional king upgrade), a full 48"x30" shower, and plush living area seating ensure a restful, home-like stay.

• Stay cool even in the hottest weather with 30,000 BTUs of A/C keeping every corner comfortable.

The 13' garage offers more than just storage — it's your mobile adventure base. Easily load your motorcycles, ATVs, or side-by-sides and convert the space into extra sleeping quarters or a rear party deck when you arrive. With the Momentum 399TH, you get both form and function.

Whether you're a weekend warrior or full-time RVer, the 2017 Grand Design Momentum 399TH delivers high-end luxury with all the rugged capability you need. Units like this don't come around often—schedule your showing today and see why this Momentum still leads the pack!