The 2025 Grand Design Momentum G‑Class 31G is a modern toy hauler travel trailer built to blend adventure‑ready capability with residential comfort. This floorplan measures just under 36 feet in length, and its wide‑body design provides a spacious interior without being overly large for highway travel. It’s part of Grand Design’s G‑Class lineup, which emphasizes durable construction, thoughtful layout, and features that support both hauling gear and comfortable living on the road.
One of the standout features of the 31G is its 13‑foot separate garage space, making it ideal for dirt bikes, ATVs, e‑bikes, or other outdoor gear. Built with 2,500‑lb tie‑downs and an integrated 30‑gallon fuel station with interior and exterior gauges, the garage doubles as a hangout or extra sleeping area when the toys are stowed. The dual‑entry design — with doors into the main living area and garage — increases convenience and traffic flow during busy camp setups.
Inside the coach, the layout supports both relaxation and practical living. The main living area typically features slide‑out theater seating facing an entertainment center, a full kitchen with solid appliances, and residential‑style cabinetry. A front master suite offers a private retreat with a queen bed and direct access to the adjacent bath, while a bath and a half setup adds convenience for guests and family. Large panoramic windows, a shower skylight, and plenty of storage enhance the interior’s livability.
Built for year‑round use, the 2025 Momentum G‑Class 31G includes an insulated and enclosed underbelly, suspended tanks, and high‑capacity furnace, allowing camping in a range of climates. Exterior features like an 18‑foot power awning with LED lighting, solar prep, and premium audio systems create a comfortable outdoor space when parked. With a 90 gallon fresh water tank and robust utilities, it’s well suited for extended trips or multi‑day stays off the grid.