2026 Grand Design Momentum M-Class 351MS

Vehicle Photo
  • MSRP: $167,850†
  • Sale Price: $97,953
  • Freight: $1,995
  • Doc: $499
  • Finance Incentive: -$3,000
  • All-In Price: $97,447
  • No-Finance Incentive Price: $100,447 Includes freight & doc fees with no finance discount
  • As Low As: $652 /mo (Edit)
Stock #: 21172346
Tucson, AZ
  • Available
  • New
  • Class: Fifth Wheel
  • Length: 40 ft 6in
  • Slides: 3
  • Dry Weight: 15,760
  • Sleeps: 6

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  • Bath and a Half
  • Front Bedroom
  • Kitchen Island
  • Loft
  • Toy Hauler
  • Two Entry/Exit Doors
Floorplan
  • Available Beds Queen
  • Exterior Height 13 ft 6in
  • Exterior Width 8 ft 5in
  • Interior Height 8 ft 5in
  • Garage Size 11 ft
  • Pin Weight 3,000 lbs
  • Gross Weight 19,000 lbs
  • Dry Weight 15,760 lbs
  • Fuel Capacity 60 gal
  • Tire Size ST215/75R17.5 LRH
  • Axle Count 2
  • Fresh Water Capacity 140 gal
  • Grey Water Capacity 52 gal
  • Black Water Capacity 104 gal
  • Furnace BTU 35,000
  • Refrigerator Type Stainless Steel
  • Refrigerator Size 20
  • Cooktop Burners 3
  • Shower Type Shower w/Seat
  • Number of Awnings 2
  • Electrical Service 50 amps
  • Washer/Dryer Available Yes
  • TV Info LED TV; LR 49"", Garage 32""

Grand Design Momentum M-Class toy hauler fifth wheel 351MS highlights:

  • 11' Separate Garage
  • Bath and a Half
  • Kitchen Island with Bar Stools
  • Overhead Loft Bed
  • Dual Entry Doors
  • Queen Bed with King Bed Option

Bring your toys and your crew along for the adventure with the new 2026 Grand Design Momentum M-Class 351MS! This impressive toy hauler fifth wheel combines serious hauling capability with the comfort of a residential-style RV. The 11' separate garage gives you dedicated space for your motorcycles, ATVs, bikes, or other gear, while the ramp door makes loading and unloading simple. Once you're parked, the garage can transform into a versatile additional living or dining area, and the overhead loft bed provides extra sleeping space without taking away from the main living area. With dual entry doors and a bath and a half, this Momentum is especially convenient when traveling with family or friends. Campers Inn

Inside, the 351MS is designed for relaxing in style after a full day of adventure. The spacious main living area features a super sofa, theater-style seating, fireplace, 49"" LED TV, and color-changing LED accent lighting, creating a comfortable place to kick back. The kitchen is a true centerpiece with a large island, bar stools, solid-surface countertops, stainless-steel sink, professional-grade cooktop, oven, microwave, and 20 cu. ft. stainless-steel 12V refrigerator. Up front, the private bedroom features a 60"" x 80"" queen pillow-top mattress with a king-bed option, plus wardrobe and dresser storage for longer trips.

Built for more than fair-weather camping, the Momentum M-Class 351MS features a 101"" wide-body SuperChassis, five-sided aluminum cage construction, MORryde CRE3000 suspension, 8,000-lb. axles with ABS, 17.5"" H-rated tires, and a fully enclosed heated underbelly. The Weather-Tek Package adds extensive insulation, while the Garage Package includes 2,500-lb. tie-downs, triple-insulated garage flooring, Tuff-Ply gas- and oil-resistant flooring, and a FastRamp rear ramp door. Add the 330W solar system, 60-gallon fuel capacity, power awnings with LED lighting, washer/dryer prep, and on-demand water heater, and you have a fifth wheel built to take your adventures farther while keeping you comfortable along the way.

 

Why Buy from Campers Inn RV Tucson? Campers Inn RV Tucson combines a wide selection of adventure-ready RVs with experienced, local professionals who understand the Southwest camping lifestyle. From transparent pricing to dependable service and support, we’re here to help you get the most out of every mile and every campsite.

Inventory/Stock Images may be shown. Colors and specifications may vary. Call our AMAZING TEAM for details.

†Airstream of Tucson 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. Airstream of Tucson 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 Airstream of Tucson 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. Airstream of Tucson 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.

**Airstream of Tucson 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, Airstream of Tucson cannot deliver the vehicle to you until the recall repair is completed. This is a requirement of federal law.

***The advertised discount contains a $3,000 finance incentive. Finance Incentive applies if financing for your RV purchase is obtained with assistance by Airstream of Tucson and placed with a third party lender. Terms and Conditions may apply. Contact our finance department for further details.