The 2026 Grand Design Momentum G-Class 350G is a large fifth wheel toy hauler designed for maximum cargo capacity, residential living space, and extended travel capability. At just under 40 feet in length with a dry weight around 12,900–13,400 lbs, it offers a wide-body design and triple slide-outs that create a spacious, open interior.
The rear 14’6” garage is one of the largest in the G-Class lineup, built to haul motorcycles, ATVs, or larger equipment. Once unloaded, the garage converts into a multi-use space with a Happi-Jac bed system, seating, loft sleeping area, and a convenient half bath. The ramp door also functions as a patio, expanding outdoor living space.
Inside, three slide-outs open up the main living area, featuring theater seating, a fireplace, and large windows for natural light. The kitchen is fully equipped with a residential 15 cu. ft. refrigerator, three-burner range with oven, microwave, and solid-surface countertops, allowing for full meal preparation during extended trips.
The front private bedroom includes a queen bed with wardrobe slide and storage, while the main bathroom offers a large residential-style shower. The bath-and-a-half layout improves usability for families or guests, especially when using the garage and patio areas.
Built for long-term and off-grid use, the 350G features oversized holding tanks, a 30-gallon fuel station, solar prep, and a tankless water heater. The heated and enclosed underbelly, high R-value insulation, and 35,000 BTU furnace provide four-season capability, while dual A/C systems maintain comfort in warmer climates.
Heavy-duty construction includes an aluminum cage frame, MORryde CRE3000 suspension, and 8,000 lb axles, delivering durability and stability for hauling and long-distance towing.
†Lazydays strives to ensure the accuracy of the information provided on this website. However, actual products, programs and services may differ materially from those on this site. Lazydays is not responsible for errors made in stated pricing or specifications. Specifications and availability subject to change without notice. Price, length, weight, or any other specifications cannot be relied upon. Buyers should verify and confirm all claims made on the website. Sale price includes all manufacturer discounts and rebates. All prices listed on this site exclude tax, tags and title fees. Applicable government fees, state taxes, dealer fees and emissions testing charges will be added to comply with state vehicle codes. Freight and prep costs are additional and vary by state. Contact Lazydays for complete details.
*90 Days – Payments can be deferred for 90 days with approved credit. Interest accrues from contract date. Financing terms subject to lender approval. Not valid with other offers. Actual products, programs and services may differ materially from those on this site. Lazydays is not responsible for errors made in stated pricing. Specifications and availability subject to change without notice. Document fees vary by location. See dealership for complete details.
**Lazydays believes the specifications on this site supplied by the manufacturer to be correct at the time posted. However, specifications, standard equipment, model availability, options, fabrics, and colors are subject to change without notice. Some equipment may be unavailable when a vehicle is built. Some vehicles are pictured with options, which may be available at extra cost or may not be available on some models. You should verify the equipment that is on all vehicles. If a new vehicle shown on this website is subject to an open safety recall, Lazydays cannot deliver the vehicle to you until the recall repair is completed. This is a requirement of federal law.
***The advertised discount contains a $4,000 finance incentive. Finance Incentive applies if financing for your RV purchase is obtained with assistance by Lazydays and placed with a third party lender. Terms and Conditions may apply. Contact our finance department for further details.
****Margaritaville offer valid for a limited time only at Lazydays RV of Tampa. Customers who purchase a new RV or complete a qualified service appointment (appointment must be booked and customer must show for the appointment) are eligible to receive a complimentary 3-day, 2-night stay at Camp Margaritaville RV Resort of Auburndale. Offer valid while supplies last. Promotion is non-transferable, has no cash value, and cannot be combined with other offers or promotions. Limit one promotional stay per customer, per transaction. Resort stay subject to availability and blackout dates may apply. Resort reservation must be made within 30 days of RV purchase or completed service appointment. Valid for Florida residents and legal U.S. residents only, 18 years or older. Additional terms and conditions may apply. Lazydays RV of Tampa reserves the right to modify or cancel this promotion at any time without notice. Void where prohibited by law.
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