As the COVID-19 (Coronavirus) continues to evolve, we are committed to following the CDC’s guidelines.

For More Info Click Here

Skip to main content

New 2021 Grand Design Momentum M-Class 398M

Virtual Tour
2021 398M Features and Options

Grand Design Momentum M-Class toy hauler 398M highlights:

  • Rear Patio
  • Loft
  • Four-Seat Sofa
  • Kitchen Island w/ Stools
  • 18' Separate Garage
  • Opposing Slides

 

Imagine your family taking turns riding your four wheelers around the dunes or taking the jet skis on the lake. This Momentum M-Class fifth wheel toy hauler offers an 18' separate garage for your toys and a second exterior entry door for easy access when the ramp door is closed. You can store additional outdoor gear in the exterior unobstructed pass-through storage near the main entrance. Now imagine your family watching the big game on the 49" LED TV with a fireplace below while sitting on the bar stools at the kitchen island or on the four-seat sofa. Now stop imagining and start living the dream in this M-Class!

 

With any Grand Design Momentum M-Class toy hauler fifth wheel, you will enjoy extraordinary living and extreme playtime with the Weather-Tek insulation for four seasons of protection and an enclosed fuel pump station to keep the fun going the whole time. The Tuff-Ply garage flooring is gas and oil resistant as well as triple insulated, and you will find 2,500-lb. flush-mount tie-downs in the garage to keep your toys secure while moving down the road. The interior includes features that are both fun and functional, like the stereo entertainment system with Bluetooth and app controls, the color-changing LED lights, the central vacuum system with tools and a dust pan, and the satellite/solar roof access channel. Any Grand Design Momentum M-Class allows you to keep your active lifestyle no matter where you decide to stay!  

What Our Customers Are Saying

Top Notch

"I have been a customer for many years now and have always been treated fair and friendly. My salesman Ben Jones and Manager Ronnie Raddigan helped me find exactly what I was looking for. I will continue to give happy dayz my business in the future and I recommend others do the same...... ps. service is top notch too : )" - Ellis
Location: Sacramento
Stock# M398M
2021 398M Specifications
Sleeps 5
Slides 3
Length 43 ft 11 in
Ext Height 13 ft 5 in
Exterior Color Burnt Orange, Blue, Burgundy, Black, Silver
Hitch Weight 2980 lbs
Gross Weight 20000 lbs
Dry Weight 15000 lbs
Fresh Water Capacity 155 gals
Grey Water Capacity 104 gals
Black Water Capacity 52 gals
Tire Size 16"
Furnace BTU 40000 btu
Fuel Capacity 60 gals
Available Beds Queen
Refrigerator Size 18 cu ft
Cooktop Burners 3
Number of Awnings 2
Axle Weight 7000 lbs
Garage Size 18 ft
LP Tank Capacity 60 lbs
Water Heater Capacity 12 gal
Water Heater Type Gas/Electric
AC BTU 30000 btu
TV Info LR 49" LED TV
Awning Info 15' and 18' Power with LED Lights
Axle Count 3
Washer/Dryer Available Yes
Shower Type Sunken Tub/Shower
Electrical Service 50 amp
For more information, call us at 916-921-2222 or Contact Us
Similar RVs and Floorplans

Loading

ManuFacts
Grand Design Logo
In 2012, we started with a blank canvas to pursue that better way, a different way, than what had been done before. A company whose culture requires a long-term, personal connection with our customers, employees, and dealers – that company is Grand Design RV. Our business model of doing the right thing has led us to unparalleled years of growth.
 
Our local workforce has been hand-picked and has an excellent reputation for second-to-none industry craftsmanship, and our CEO and Senior Management actively work with the production facilities to help build the team and develop products.
 
At Grand Design we've raised the quality bar by putting every unit through a series of quality inspection gates during the manufacturing process. Once completed, the unit undergoes a comprehensive “final finish” inspection. Every one of our coaches is shipped to a PDI (Pre-Delivery Inspection) area where they are put through a rigorous 300+ point inspection checklist before being shipped to our dealers.  And, we back every one of our coaches with a 3-year limited structural warranty.  
 
At Grand Design our goal is simple – continue leading the industry with quality products while improving the customer’s RV experience before, during and after the sale. We strive for nothing less than customers for life and we would be honored to personally welcome you to the Grand Design RV family!
Happy Daze RV is not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales taxes, registration, tags and delivery fees. Manufacture pictures, specifications, and features may be used in place of actual units on our lot. To preserve the quality and mileage of our coaches, we only do test drives with a qualified offer to purchase.