2018 Grand Design Momentum 354M

The 2018 Grand Design Momentum M-Class 354M is a rugged yet refined toy hauler built for both adventure and comfort. Stretching roughly 39′ 4″, this fifth wheel blends high-capacity storage with residential-style amenities. Its design features a large 11-foot garage with triple-insulated Tuff-Ply flooring and 2,500-lb rated flush-mount tie-downs—perfect for ATVs or dirt bikes. Built for four-season use, the coach is constructed with Weather-Tek insulation, including triple-insulated floors and walls, plus a fully ducted underbelly.

Inside, you’ll find a main living area with two slide-outs to maximize space, leather recliner sofas, a 49″ LED TV, and an electric fireplace for cozy evenings. The kitchen features a full-size 18 cu ft four-door refrigerator, three-burner stove, convection microwave, and double sink.

The front master suite includes a queen bed, plenty of storage, and a loft above for extra sleeping or cargo space. The bathroom includes a shower and toilet, and there’s a second entry for easy access to the garage. Outside, dual power awnings, an outside kitchen, and a rugged underbelly make this toy hauler ready for serious play or extended living on the road.