We Are Open
(see hours below)
The Internet Team is Available Everyday

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:

  • Fireplace
  • Queen Bed
  • Kitchen Island
  • Dual Entry Doors
  • Universal Docking Station

 

This toy hauler is decked out in luxurious features you will want on your next outdoor adventure! With 18' of cargo space and a rear ramp door, you can bring along your favorite off-road toys too. You will start each morning feeling clean and fresh after a good night's rest on the queen bed in the front private bedroom and showering in the sunken tub with seat and skylight above. The kitchen has everything you will need to create home cooked meals, as well as a kitchen island with two bar stools and a USB charging port. Grab a snack from the kitchen pantry and relax on the four-seat sofa slide with a stowable table to set your food on. The garage area has an overhead bed, the space to add the optional two Happ-Jac's with rollover sofas and table below, and it is prepped to add the optional washer and dryer, plus you can even add the optional half bathroom!

 

Live big and play even harder with any one of these Momentum M-Class toy hauler fifth wheels by Grand Design! The CRE3000 MORryde® suspension system improves its towability with a smoother tow and better protects from damaging road shock. Unlike many other toy haulers, Momentum features an exclusive garage floor design with a R-40 triple insulation in the garage floors, and a Weather-Tek insulation throughout the roof, main floor, and side walls. Pump up the volume and shake things up with the optional Rockford Fosgate speaker package that comes with a 12" subwoofer, a 400 watt amp, and eight 6" full range speakers. You will also enjoy the fully enclosed fuel pump station, the door side exterior spray port, and the four mandatory packages full of extra features that will make your next camping adventure luxurious!

Options:
  • 18CU FT REFRIGERATOR
  • 2ND A/C BEDROOM 15K BTU
  • 3RD A/C 15K BTU
  • 3RD A/C PREP
  • AUX FRESH WATER TANK
  • COOPER H-RATED TIRES
  • EXTERIOR ENTERTAINMENT CENTER
  • GARAGE LED HD TV
  • GEN II 3 SEASON DOOR W/SLIDING WINDOWS
  • HAPPI-JAC ELECTRIC BUNK SYSTEM
  • HEAT PUMP A/C
  • KITCHEN POWER FAN W/RAIN SENSOR
  • M-CLASS EXTERIOR PACKAGE
  • M-CLASS GARAGE PACKAGE
  • M-CLASS INTERIOR PACKAGE
  • MOMENTUM PATIO CHAIRS
  • ONAN 5.5KW GAS GENERATOR
  • REAR ALUMINUM DECK SYSTEM
  • ROCKFORD FOSGATE SPEAKER UPGRADE
  • RVIA SEAL
  • SOLAR PREP
  • UNDER UNIT LED LIGHT KIT
  • WEATHER-TEK INSULATION PACKAGE
What Our Customers Are Saying

We love our Raptor!

"This is my 6th RV purchase and Happy Daze has been the best. They have been 100% on the contract of sale and went to bat for me with the factory over misquote by the factory. I will say thought that Keystone has been there also when they mis quoted. We love our Raptor and so far the Service Dept has been fine. This has always been a sore point however so far they also get 4 stars. Let me explain - Anonymous
MSRP: $115,317
Location: Sacramento
Stock# 65967
2021 398M Specifications
Sleeps 5
Slides 3
Length 43 ft 11 in
Ext Height 13 ft 5 in
Interior Color PEBBLE
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 35000 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
VIN 573FM4537M1117981
For more information, call us at 916-921-2222 or Contact Us
Similar RVs and Floorplans

Loading

ManuFacts
Grand Design Logo
Thank you for taking the time to view and consider Grand Design RVs, where we build every RV to deliver more features and superior value for your dollar, then we back every one of our coaches with a 3-year limited structural warranty.
 
Every Grand Design RV is put through a series of quality inspection gates during the manufacturing process.  Once completed, the unit undergoes a comprehensive final finish inspection before being delivered to our dealer network for you to view or test drive.
 
We deliver the highest quality RVs in the industry, but anything built by humans can be subject to issues.  It’s how those issues are addressed that stands out with Grand Design. We stand behind our products, and stand ready to assist customers whenever needed.
 
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.
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.